I personally think the CM quickfire is the best choice if you don't need a numpad, and don't mind the excessive logos everywhere, or a White Leopold from elitekeyboards. Only thing is they're both $89-90 and shipping might make them out of your price range.
The K60 and the Rosewill RK-9000RE are currently both on sale for $80 each on Newegg,
though I'm hesitant to recommend either - I don't buy Corsair's excuses for not making it fully mechanical yet charging the same as one, I have a RK-9000RE which I quite like and have no problems with, but i've heard of one or two people having problems with the mini-usb connector on the keyboard.
So if you can't gather a few more $, i'd say just go with the K60 if you're okay with a few keys not being mechanical - better a few keys dying early than your whole keyboard being useless if you have problems and for some reason you can't RMA it. Maybe someone else here can recommend something better for the price though...
Edited by Sainesk - 3/16/12 at 8:13pm