true... i just like the HD motor a bit more... Rev tech is the one i tend to stay away from although i have used them... problem is compression... putting that monster together and not having the space for compression releases sucks! i am pulling the heads off a revtech 110 right now to have releases put in.. hahaha problem i run into with REV an S&S is the idnition systems they over heat, you have to mill out the cases to keep them cool and then you run them exposed for moisutre... that is really the only neg i have to say, plus wiht a simple spring repalcemetn on a twin cam you can get WAY WAY better oil flow allwing you to run longer lines and oil coolers thus keeping the motor cooler and the legs/balls of the rider from baking on hot days... other than that... s&S and rev tech both have completely polished motors.. and to be honest... that is simply SICK! i love it... if i could get a polished twin cam for a build i woudl be all over it, problem is i would have to do it myself and i like my fingertips... all that time over the wheel would suck! hahaha