Please drive one before you start ricer-fy-ing it. The TSX is a really fantastic setup out the door. Unlike the Accord's from years past the stance and wheels are really spot on. And it's not some mushy rider...
Comptech makes some better then average goods for the car (if the Mugen fair is a tad pricey for you), with the S/C adding a nice dent to the wallet should you choose such.
Honda did a great job with the body kit and A-spec options as well. You can have that lowered look and a great matching body kit to boot.
But if neon lights and chrome strut bars are your thing I'm sure Ebay if full of them...