Yeah, in the link up above I posted an XBR. But tonyking mentioned that he'd like the possibility of a mod motor. Looks like the XBR can handle down to an 8.5 pro motor and I assume this means the Velociti motors. But I'm not sure. If you don't plan to get too serious about racing then the XBR would be good like BuggyKing suggested. I have no idea how the 8.5ss pro would be. I've only used the 7.5