Arduino UNO/ZERO PRO, enough computing power for PID-controller? I am currently working on a project, where I design a PID-Controller for a 2-axis stabilization with brushless-propeller-motors.

My question is: Does an Arduino UNO have enough computing power to perform this task in a useful manner? Arduino UNO Specs

And secondly: If the UNO was really too slow for this task, would the newly released Arduino ZERO PRO perform at an acceptable rate? Arduino ZERO PRO Specs

Thanks for your help and inputs in advance!
Assuming you're not doing anything too fancy, yes, it should be fine.

There's even a library to do all the work for you: http://playground.arduino.cc/Code/PIDLibrary