Im running a SXX and its one of the fastest cars out there. 13.5/single cell will not keep up to 13.5/4cell. When you goto single cell you have to up the motor. So if you wanted to run with the 13.5/4cell guys you need a 10.5 with your single cell.

The RS pro might be a bit better/faster but the one guy running it at my track is only a touch faster at the end of the straight. Hes running the new 40c packs too. The SXX/novak combo is very easy to setup and tune for top perfomance.

DK