I have the K95, and I can't recommend it. I had the K90 but had a problems with key presses. I would hit a letter once and it would somehow see my press as if I pressed the key twice making it incredibly annoying. It also had problems in games like need for speed where it would randomly steer left or right (using wasd) even if I was just holding the W key.
Anyways, I RMA'ed the keyboard and Corsair sent me back a k95 which is a great looking keyboard, but the same issue is still there. Which is really annoying considering how much the keyboard cost. :/