I'm sure others will suggest some cool HU's. Crutchfield has a couple that look SUPER cool @ $1200 and $1500. (That was my whole budget though)
I have a 13, so IDK what HU you have. (I had the base pioneer one)
I think this is a good deal... If you are looking for something like this...
http://www.ft86club.com/forums/showthread.php?t=131890
I had a pioneer DVD in mine for awhile. But,
now I have a Sony. The sound is better and louder. It must have a much higher preamp voltage than I had on either Pioneer.
I also have a class a/b 4 channel that I am running to the other speakers.
Six 4"
Four 6.5"
One 10"
Link to the sony I have... It has Sub out, and front and rear pre outs. I like it. I got mine for $150 off ebay new. I'm running 2awg power and 8awg ground. ( having a oversized power, and the shortest ground cable possible will help you not have a ground feedback loop)
It's got the pre-outs, a nice knob, and IMO sounds very good.
https://www.abt.com/product/110990/S...&utm_medium=sc
IMO a reference HU is cool when the car is off and there is no other noise. Otherwise, with my car running, I can't really tell the difference between a reference McIntosh or a regular Sony. I have not added any sound deadening.
Just my $0.02...