There are a bunch of threads about keyboards, just search on the forums "Keyboards"(or something like that).
From my experience, since the keyboard section is so large, it really doesn't need to have a "gaming" tag next to it to make it a good keyboard, you can buy a 20$ Microsoft keyboard, and it'll be ok, as long as you like the way it feels, and it doesn't break after a 2 weeks, it's a good keyboard.
If you do want to get a gaming keyboard, I would say a Noppoo Choc Mini, Microsoft Sidewinder X6, ThermalTake Meka, Razer Blackwidow (really expensive), I'm pretty sure all of them are over your price range, so just ignore what I wrote and look at what I wrote above.
Also, just the Sidewinder X6 has actually a volume control.