Any of the 3 flounderlipps just mentioned are great street blowers. (instant off idle boost, torque) If you want to run it on the track I suggest a Procharger centrifugal blower. (Decent bottom end power, but huge mid and top end) A centrifugal will make more noise at idle and gives that whistling sound while cruising. The 3 twin screws mentioned above make hardly any noise at idle or cruising, but make a cool whine while under hard acceleration. I'm pulling the Procharger because my son wants it and I don't hit the track much at all. I'm going with a Whipple probably in November.
Whatever you get I highly recommend a professional dyno tune to get the air/fuel ratio right. It's insurance.