I'd go to StraightLine www.1320hp.com
I have been going there for 3 years and have never had a problem. They are amicable and you can ask any kind of questions without the typical attitude from other shops ask for Mike (the tuner) or Nick (the boss) and tell them Zeke sent you. Just my .2 goodluck with your modding!
2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.