The showcases were on dsport magazine. You can find them on their website or go to their YouTube channel and watch the videos. Remember though, for the intake showcase, they only rated peak power.
I like the idea of the full exhaust. We think alike
I strongly recommend the FT86SpeedFactory UEL header. It's hard to determine which design is superior when you compare EL and UEL. If you compare a knock-off EL that was made in China to the FT86SF header, UEL is waaaaaay better and vice versa. You also have to determine if you want a cat (catalytic converter) in your header. This catches some of the crap that comes out of the engine so that it doesn't pollute so much. Depending on your tune and fuel, it can get ruined, but that takes a while. It usually makes the exhaust note less raspy, it makes it quieter, it's extra weight, and it robs horsepower. I wouldn't ever run a cat if I upgraded a header. Some states like California test your vehicles emissions, so you would need a clean emissions system an engine that runs good to pass the test and not get any fines. I don't live there, and my state doesn't do that test, so although your aren't supposed to take it out, no one will give you crap for taking it out if you're in Florida.
By the way, all if not most aftermarket exhaust parts will fit together. Why do you want a high-flow cat?
If you're on a budget and want some power now, get the FT86SF header and tune it. You will eliminate the torque dip, not increase noise, get that badass UEL sound, get sound when you want it without drone, get rid of the bipolar ECU, and gain a reliable 20whp without sacrificing a noticeable amount of fuel economy. If anything, it'll go up.
The Perrin CBE is not super loud or quiet. If you end up getting a full exhaust and you're worried about noise, all you have to do is pick a quiet CBE. One example is the Invidia N1. It's a great exhaust, and it's a little on the louder side. The Invidia Q300 is the exact same exhaust, but it has a different muffler. Even with a full, catless exhaust, you will not experience drone with a CBE like that. Go to FT86SF's channel to check out the header with a stock and full exhaust and some other exhaust sound clips.
For suspension upgrades, it depends on your budget. Here is what I recommend:
Really cheap: eibach lowering springs (sportline is stiffer and gives you better handling. Pro kit is softer, gives you a more comfortable ride.) This will lower the car 1.4 inches. The springs are also slightly stiffer than stock. They cost around $250. The springs still keep the same ride quality as stock according to reviews
Cheap: Eibach sportline/pro PLUS kit. This is the springs, front and rear sway bars, and the bushings for the sway bars. It's around $400.
Average: Tein coilovers (anywhere from $900-$1k+) this is signifca toy stiffer, you can adjust the damper, you can adjust the amount that you lower the car, and deepening on how much you spend, you can adjust more. There are some affordable 36-way adjustable ones. Excellent choice. It'll drop that car anywhere from .5-4 inches. I strongly recommend sway bars which will be another $200 (Eibach)
Expensive: KW V3 coilovers. ($2300 or something) AWESOME COILOVERS!!! Some of the best on the market. Stiffer spring rate that results in better response, feel, and cornering ability, a lot of adjustment, so you don't have to lose much ride quality at all. I can go on and on, but these coilovers are just awesome. I recommend sway bars too.
Additional:
Wheels and tires on this car is a must!!! For some bang for the buck, I recommend Enkei RPF1. Not a great looking wheel, but they are super strong, and high quality at a relatively low price for that type of wheel. I recommend the size 18x9 or 18x9.5. That should fit on a 245/35/18 tire with no problems with rubbing against the car or anything like that. One of the very best tires money can buy is the Michelin Pilot Super Sports. The wheels will help the car turn easier, accelerate faster, gain whp, etc because it's rotational mass. The car comes with terrible tires, so any high performance summer tire will completely change the car for the better. Go to tirerack.com.
If you want to drift at least some of those suspension mods are super helpful. You're also gonna want rotors and pads. If you want to save money, go to FT86SpeedFactory.com, and look at their brake packages (Not the big brake kits). If not, get the rotors you want, pads for the front and rear, brake fluid, and stainless steel lines. I recommend Hawk HP+ pads. Another good mod is the master cylinder brace. It enhances the feel of the brake pedal and it's only $100. You might also want to adjust the E-brake to your liking.
Other mods:
When you get your exhaust parts, I recommend that you wrap them in heat wrap. This makes the exhaust hotter, making the exhaust flow better and fast, and it insulates the pipe, keeping heat away from the air intake and stuff. Get DEI titanium heat wrap with LF technology or whatever it's called. Simple, cheap mod.
Our cars runs hot, so I strongly suggest that you get a radiator and oil cooler from mishimoto.
You might want to lower rotational mass with a crank pulley, driveshaft, and flywheel. This increases throttle response and horsepower.
You may also want to consider little things like a shifter bushing, short shifter, shift springs, or transmission mount from whiteline, Perrin, kartboy, MTEC, etc to just make the car feel more fun. The shift knob even makes a big performance and aesthetic difference. Heavier shift knobs can just be slapped into gear, and shorter ones can help you feel the transmission. The stock one may be fine for you though.
You might also want to think about aesthetics like winjet headlights, shark fin antenna clear side markers, a body kit, 5:AD spoiler, diode dynamics led kit, toms tailights etc. Doing some work to areodynamics is a good idea too. Although the Rexspeed body kit is a little pricey, it's functional, subtle, and good looking. It lowers drag (air resistance) and increases downforce (the force of air pushing the car down. It gives you stability.) the driveway labs diffuser is also cool and functional in the same way. It might not fit very exhaust though. The OEM diffuser is cool too but not functional. Check out the My interior Redesign thread to see some cool stuff. I suggest that you get the OEM armrest too. You might also want to upgrade the stereo. Go to crutchfield.com to learn all about that.
Window tint
With all that, you're gonna want an alarm!!! Clifford makes some of the best stuff out there. Check out their website.
Note: I had a lot of ideas when I wrote this, so I probably forgot a lot. Sort about that. I'll reread it and add something if I remember

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BEST OF LICK!!!
For me, there is no glide in pulse and glide :p