MainStream Performance because i know the guys pretty well. Always go above and beyond. Great prices,great customer service. Scotty does all my honda tuning. i dont get the former employee discount though :P

ZEN- They have done some work to my RX8 and ive bought parts through them too. I know the owner pretty well and again they go above an beyond. Excellent customer service.

Killswitch Performance- Known tyler and carina for awhile. They did a bunch of work to my 180SX when i had it and i couldnt ask for more. Quick work, great prices, very friendly.

Batlground- Brandon is one of my favorite techs ive ever worked with. Super nice guy, always goes above and beyond. Dan is an awesome tuner and i wouldnt hesitate to have him tune anything i owned. On a personal level, I admire Tracys instinct and ambition. Never dealt with her professionally (as in when she worked at the shop because she was out of the shop by the time i got there) but despite everything i have never had any problems with her or the guys at BG.

Thats who i have dealt with and gone too. Other shops i cant comment on because ive never had work done. I like to stick to what i know.