CMStorm Quickfire with Reds for a numpadless model; Rosewill RK-9000RE for a full-sized Reds model. I'm typing on the latter right now, and the keys still feel great; smooth like butter.
Also, virtually every day, we get about five other topics asking the same thing. There's a great wiki that covers everything you need to know up top; it's the first one when you click the Wiki tab.