Where are you at right now? The SSS guys seem to really like the 228R in the LQ9 but if you aren't worried about daily driving I'd say a TQv2 or maybe even an MS3 would be alright. I'm planning on a TQv2 for my truck because I already have a 3200 stall and really open exhaust plus I'm going to drop on a FAST 102/102 for the trucks.
2005 Silverado SS AWD
AEM CAI, ARH LTs, HD-2 shift kit with vette servo, Circle D 278mm 3200 stall Madtunesracing.com street tune (MTR now has a Dynojet 248 chassis dyno)
13.82 @ 94.92 w/1.83 60'