hey guys i was wondering what exhaust was best for a 400ex? i want to get the cobra off mine for something better. i've been looking at the supertrapp ids2, white brothers e-series (on ebay since they're out of business, i prefer white brothers but it's whatever), hmf sport, hmf ironman, hmf ballance, and motoworks... i'm open to more ideas though if you guys know of any other good exhausts.