If you run on high traction carpet, the R1 might be better for you than the R1 pro spec. I have the pro spec, and found it to be very flexible. The R1 has a stiffer chassis and top deck than the pro spec. If you run on asphalt, the pro spec might be the better car for you.
I've ordered parts from tqrc, rcmart, as well as directly from spec-r. All have been good to deal with.
VBC D08, D07, D06 Dynamics, Ghost EVO, Lightning 12v2, Serpent S100LT, Speed Passion SP1, Tamiya M05v2