Thats what I have on my Revo with a TrueRC 4s 8000mah lipo and it is definitely an awesome setup! I was running a Feigao 8XL but it would heat up real quick and the Neu seems to run smoother than the Feigao with the new MM firmware.
its good you are happy with the True Rc cells, trying
a pack with Enerland cells will give you a noticable improvement