Hobbywing 4465sl 44mm motor

[jsr]

Haven't tried one, but since it's quite a bit larger, it should generate a lot more torque and thus will have less trouble pushing around whatever it is you're pushing. The price for one starts to inch pretty close to a Medusa or CC/Neu, so personally I'd pick up the CC/Neu or Medusa, but if those are still too much, the HW 2000kV 44mm should be a pretty good monster.