Go with the KB or Whipple. My tuner says the Roush blower isn't as good, you just get to keep your warranty and spend a lot of money when you can get something better.
The KB and Whipple are complete setup's. I think the tune that comes with the KB is for a stick and not an auto.
My tuner was putting out 575hp on a rebuilt motor with the KB.
I have the Saleen S/C and putting out 420hp/390tq. But I would rather have the KB or Whipple.
Keep an eye on your cats also, the right side cat have been going bad. My tuner told me my right side was real bad.
PM sent also.
Saleen S/C, 4R70W Trans
, 3:73 gears, 3200 stall PI, GT500 fuel pump, JBA Shorty headers.