I was going to do the XP cam but the powerband is moved up higher, which makes sense why it makes about 5-10 more horsepower (as ZZP says) than the VS cam. Also, I read that since the VS cam's powerband is in the lower RPM range, it can hold it's weight against an XP setup from a dig up until around 95-100 mph, which is far more than I'll need. That was from a person who ran the XP, S1X, and the VS. I don't know if it's true, but it seems logical. Another thing, I'm afraid of the strain the higher rev limit of the XP cam may put on my engine. Should I not be? Thanks GMR.