I have done more research and I am thinking the Whipple. And you can change the PSI on the whipple. And the website claims up to 700 RWHP with all the upgrades obviously. I am a whipple guy now.

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i dont have any complaints with the roush blower at the stock boost levels i ran 12.7s with the car being show room stock, did 367 rwhp on the dyno with it. After turning up the boost and a few other minor changes it was 448 rwhp and i havent had a track pass with it yet, but running against another stage 3 car in town i was way faster than it