Well if we stick with scorpion motors because they are high quality and if it gets nackered you can send it back to scorpion and pay a cost price for a replacement (done it myself before)

http://www.hobbyking.com/hobbyking/stor ... Motor.html

Something like the above wouldn't be a bad shout. Only thing you will have to keep in mind is the KV rating. Basically take this number and multiply by the number of volts you will be passing through the motor to get the motor rpm.

Twice the power as well.

Esc wise well tbh I haven't had great luck with the more expensive esc so this year I'm going to run some dirt cheap ones and see how it pans out.

Going to use the base for the 85a botbitz controllers

http://www.hobbyking.com/hobbyking/stor ... _SBEC.html

The advantage is that I can order a bunch and hack some for my drive whilst using the others for brushless drum weapon