The FC660C is a really great keyboard, one of the best you can find on the market at this point. When I say one of the best, I mean it could very well be in the top 5 (let's say... Model M, RealForce TKL, SSK Model M, HHKB, FC660C, in no particular order). OK, this is controversial...
I think it is easily at least in the top 10, whatever is in this list.