I am using this combo:
http://www3.towerhobbies.com/cgi-bin...&I=LXXKA8&P=ML
I have only lightly bashed with it once, it should see some track time this Wednesday though, which is what I got it for. The motor and ESC were both barely warm if that, but again, it was just a light run and I never got a chance to test out full speed.
The motor is 5000kv, but the truck is so light especially with a Lipo, it should be okay, but I will know more on Wednesday.