In my experience the RAC CB irons are no more forgiving than the MBs - almost purely a cosmetic change. Therefore, if you are looking for a combo set seeking forgivness in the long irons, the Titleists may be a better bet.
I would say not. Taylormade are generally not that obvious when it comes to protos- ie, not writing it (very poorly) on the side of a dodgy headcover :?