Buy a cheep one and spend the money on something useful, keyboard do not really help what so ever. I got this one for like 25 euro and I would not want anything else:
http://www.roccat.org/Products/Gaming-Keyboards/ROCCAT-Arvo/ and before that I had a 5 euro wireless one from tesco and honestly I dont see much of a difference besides some nice blue lights and maybe the keys are nicer. DO NOT GO WASTING 100 euro or what ever on a key board, there is so many better ways to spend that money. You will regret it on the long run.