You have to figure out what works best for you. No one can guess what you are going to like. Torque is important but for lining speed is more important in my opinion. Rough math will tell you 140cps is around 8400 cycles or rotations per minute. Thus 9000rpm should be your minimum speed for lining. 1200rpm will give you a better range and most likely better torque.

It might be better help if you start with what motor you have.