I've tried a variety of switches. From blue to black and red. I'm going to experiment with the browns soon. At the moment, while the tactile feedback is nice from the blues, the sound may be a bit too much. I'm using the K90 right now and it's a phenomenal keyboard. My girlfriend uses the K70 and she enjoys the light linear switches as well.
Corsair's next keyboard will be the Corsair RGB, which features switches in red, blue as well as brown. Fully customizable backlighting, as well as a brushed aluminum surface. Keys are elevated above the base, so cleaning will be easy.
Can't wait!!