Hi there, I am pretty new to Arduino and driving motors and am searching through threads to get ahead a bit. Would it be possible to drive the two above linked motors with an Arduino motor shield or is easydriver by far the better solution?
See Reply #2 - the motor shield is just a conveniently packaged h-bridge.
Similar to madcow213 I will need to make two stepper go at the same time, with speeds of around 200rpm maximum speed. I currently have the step motor 28byj48 but was told that these would only give me around 10rpm.
I think the 28byj48 is a unipolar stepper. You should use a bipolar motor. Wikipedia explains the difference well. The driver boards such as the Easydriver do not work with unipolar motors.
First thing you need to figure out is how much torque you need from your motor. The quoted "holding torque" applies when the motor is stationary and the available running torque will be much lower. Some of the motor datasheets show this on a graph.
When you have identified a motor with sufficient torque then you need to identify a driver board that can comfortably supply the current the motor requires.