Don't discount left of field mods. I'd view a final drive ratio and lighter drive shaft to be pretty up there, bang for your buck wise.
If you are more interested in staying NA and, what the most common mods yield on our platform, then this will be of some help
http://www.ft86club.com/forums/showthread.php?t=81493
As others have said. I'd start with seat time and get a better feel of where the car is at now and what you believe it needs to make you love it that little bit more.