GIAC all the way, i have personally dyno'd with APR, REVO, UPSOLUTE and my car made more power w/ less mods than all of the others, you can read all of the shit you want but GIAC is the only chip i would put on my car.

If you want i'll have tracy/dan pull the dynos for ya and show ya whatz up... my car made 40+hp/70+lbs w/ chip alone.

*i will say i've have seen an APR 93 make a few more hp than GIAC 93, but torque was big differance and GIAC has it in the bag