What motor to get

I got the motor shield from: Motor Shield - Arduino motor/stepper/servo control

I was wondering what motor can give me torque. I went to the nearest electronic store and found several motors. I need 4 so I guess I have to go with DC motors since this shield can only allow 4 dc motors (or 2 stepper motors).

There was a Ametek 24VDC (116869-01) motor there but I can't find any info on that motor (there was like a 7 pin connector on it).

I was wondering how do I distinguish the torque that I can get from a motor?

If a motor has a 7 pin connector it is probably not a DC motor unless i has some kind of build in encoder.

Yoy really need the datasheet for a motor to find out about it's torque.

There's some info here: http://www.romanblack.com/stepper.htm about measuring torque and phase angels, but only for stepper motors.