i'd go with kenne bell. i love the way that sounds winding out. not too mention, from what i have seen on the street, they are shutting down most of the compitition.
i'm just midway into 4th at the end of the 1/4 with 4.10s either your buddys shifting at like 3500 rpms or hes lying.
i'm going to have go +1 with gearbanger. and then if your not happy with the performance, throw a different pulley on and there you go, couple more #s of boost.