Looking for a good speed controler.

Thanks for the info.
I think from the info that i have now recieved and found I think the best option to go for is the Neu 1515/1D motor.

I will run a tad over 40,000rpm and i think it will have enough torque with this high gearing 33T/54T without over heating.

Just got to find out if it will run of the Mmaba maxx speed controler.