CPE Flash $465 gives you throttle control and eliminates fuel cut.... maybe 20-30hp gained....
Standback w/pnp is $850 - Tune yourself to every little mod and condition, but will need experience and still don't have full throttle control... lots of HP gained (still should get CPE flash though)
Cobb AP - $695 available maps, throttle control, no fuel cuts.... tons of HP gained
Honestly... I think Cobb is the winner... I have the SB cause that's all that was available to me at the time. But I love the fact that I can adjust to every little thing...