First highly technical modification was the installation of chrome valve caps. After that I added a subwoofer once I got past not wanting to dissasemble my brand new car.
Next will be a bit of an altitude decrease and then I'm done until an ecu upgrade comes out.
I had the dealership tint mine before accepting delivery, increased my payment by about a $1.50 or so, I think, but meh. My short antenna's on its way as we speak, but I don't think that qualifies as a "mod"