Which exhaust would be better to use on a Warrior with a K&N filter and a DynoJet kit? I have seen the Duncan double-barrel exhaust for around $350 w/head pipe. I have seen the White Brothers E-series for $250 w/o head pipe. And if anyone has one or knows where they can get one for cheap I can get some good prices on Home Theater, Car-audio, and Computer/camera equipment. Thanks a lot