Firefoxuser,
I have the HPI RSR body and it fits the M06 perfectly. I presently race it with the Alfa GTA body and do pretty well.
Like you, I don't like the M05 front drive. It takes a bit more to drive the M06 right. I would recommend trying to pick up the M06R if you can find one somewhere in stock. The rear axle weights really help.
I'm guessing we will shortly see an M06 Pro Ver II from Tamiya since the M05 was just updated