NI has lopped the end off of a S8 and called it a Kontrol D2. Jared got a pair and used them with his S8, turntables, and just about anything he could lay his hands on. He wrote many words, and named it a review.
If you're going to use software, it's a safe bet that the hardware designed for it is going to be pretty hot. Such is the case with the Ableton Push. DJWORX teamster Darren E Cowley of Isotonik Studios impulse-bought one, but after the shortest play ended up boxing it up and putting it on to of a wardrobe to do house renovations. But having dug it out again, he sees what all the fuss is about. Here is his very detailed review, with a second opinion from Mark Settle.