Go with something that works for you. Any top buggy can win you races (Losi, Mugen, Jammin, Xray, TTR, Kyosho, etc.) It's really the driver and the setup.

As for the TM M1-B, I don't know too much about it, other then the fact that it is very innovative. There is a ton of features on that buggy that have never been seen before, so I'd wait for a little while until they straighten the kinks out.