Hi,
As redreprap saied,the parameters that come with the motors are extremely important.
You need to look for both the torque AND the AMP/PHASE (current).
If you are using the 4988 stepstick (or anything with the allergo 4988), the the way the driver is manufactured can influence your driver operation..
The number of layers in the PCB and the amount of copper help desipate heat - the driver usually heats alot! and the faster it HEATS --> the less current it will produce --> the lower the torque on your stepper motor will be --> the less stable the motor will become!
In short, i really THINK that you should choose a STEPPER MOTOR (if youre using the 4988 driver) with a torque around 4.4KG/CM WITH around ONE AMP/PHASE!!! which means that a motor with 1 amp/phase is -better- than a motor with 1.7 amp/phase if both have the same torque! heating is VERY important and should be considered when choosing your hardware!
