well, that is the debate...They say RM is more for the beginning driver because its easier too toon, but I recently saw a novice driver get much better with the MM over RM. Since you have been racing for 3 weeks, the RM might be best. Maybe some of the more experienced W3 racers can assist you. but SRS is "supposed" to be a high traction mm style track. if "I" were your, I would get the B5M... but that is me.