You'd be better off with an Xfire for that type of racing. For an M, you could put Xfire A arms on, stiffen the rear skid shock to decrease transfer (keep the skis on the ground)
The 90 duro pow claw might be a good track for that, not sure on the mtn tracks for that type of snow.
Cutler snow eliminators work very well on the 07 also, wherever your feet end up you've got traction.