For about £50 I'd be looking for a Logitech G110 personally, in fact you can get it for slightly less.
Apple keyboards certainly look nice if you like the minimalist aluminum thing. I've only every used them, and then very rarely, for typing, never gaming but they certainly wouldn't be my choice as a gaming keyboard but your mileage may vary!
I'm sure someone will be along in a minute with some other recommendations, I'm sure the Microsoft keyboards get good reviews and are cheaper still.