I have a M-audio UNO http://www.zzounds.com/item--MDOUNO that works just fine with all my apps that use MIDI, including M8. Using a device like this should have no noticeable impact on your computer's performance.
I need a controller that is basically the microKontrol, without the keyboard. I love the Micro's pads and slider and knobs. Is such a thing available? Thanks in advance for any info.