I replaced my Logitech G11 with a Razer BlackWidow Ultimate and I absolutely love it. I like backlit keys, and the other mech keyboards seem to omit that feature. I almost got the Steelseries, but someone pointed out the half size backspace button, which would drive me NUTS!

If Logitech makes a mech gaming keyboard, I might switch, but I'm starting to take a liking to Razer. Maybe I'll switch out my G700 mouse for a Razer Naga...