I recently upgraded hardware and am now using an NI Audio 2 into an A&H Xone 22 with a MPD26 to control everything else. I was previously using an MPD18 and Xsession Pro. Oh and I'm using Mixxx still since Native Instruments hasn't sent me an email yet for my free upgrade to Traktor Duo 2 for their "Fatten up for Winter" deal.
Here is how everything looked after I just threw it together quickly so I could get back to mixing.
After some cleaning up and organizing
Old gear
Before I got my Macbook Pro, still using my old Dell at some party
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