Evans Tuning in easton, hes a honduh guy but he knows his ish:
http://www.evans-tuning.com/viewtopic.php?t=1196
Custom Cars by Koz in reading (nice facilites but no in house tuner):
610-777-7366
KDR Rotary used to be in nazereth, but I guess they moved. I've heard horror stories about thier tuning (but who knows with rotarys)
www.kdrotary.com
and theres Xotic (I can't vouch for thier tuning services personally):
http://www.xoticmotorsports.com/
good luck with the turbo kit, I've always wanted to see a boosted 3 series. Bet it sounds like pure sex.