with the Neu motors will the MGM or Quark give more torque than the 1515/1D?

I really need a motor that is going to give a real lot of torque at 11.1V and also run up to about 40,000rpm.

I had a look at the Neu site and it was either a 1515 motor or a 1512 motor.

I take it that the 1515 is going to have mor torque than a 1512 motor but no they have more torque than a MGM or Quark.

The transmision isn't going to be a problem as it is a metal one.