Can echo the comments on Rosewill keyboards flaking out. Had one, was real nice, mechanical keyboard - worked jsut aces for a month or two, them just went belly up. Shame really, Rosewill PSU's are pretty good, but wouldn't recommend the keyboards.
Went with a Corsair K 90 Vengeance mechanical gaming keybd after that one and it's a real keeper. Pop the keys off every month or so for cleaning and not a problem thus far.
(sorry for the OT post!)