Personally, I don't enjoy driving the FXO. I'm basically unable to feel what the hell is going on with the car. It seems to me to have somewhat of a random understeer/oversteer thing, so that i never know what I'll get in the next corner. Wouldn't it be better to start out with the RB4, then move to the XRT and THEN the FXO, when you've mastered the two easier cars? You know, kinda like in STCC 1a and 1b :P