Im looking at buying the a 500 pro. im still running windows 7. I read on roland site that ot supports 7...8..8.1 but my question is if I have to go to wondows 10 is it compatible? thanks. any input on a keyboard controller in the same price range thats good with cakewalk professional would be apreciated. 

Sorry for the late response, I nevver look at this forum. I have the A-Pro 500 and it functions very well under win 10. Be aware that this may be the next bit of hardware that Roland will abandon. Because of this, I would look at all the options in your price range. Right now the midi is not bad, aftertouch is poor and the control surface will work well to control the transport and basic controls while working in Sonar.