Not sure where you're at in Jersey, but if you're willing to drive a little bit (depending on what you want done--you should be), then head over here
R/T Tuning – Dyno Tuning & Engine Performance Specialists | Philly Area Speed Shop & Dyno Tuning Experts
I've had great experiences with them. All I've heard are good things about them. You'll find a lot of positive feedback about them on this forum and on many other car forums. You could quite easily throw those guys in the argument as the best place to take your car on the east coast (or anywhere, really) if you're interested in aftermarket parts/installation/tuning/etc.