I use the BW for a bit whenever I go over to my mate's place for some SCII matches. Well, I can say that it's a good board with nice design stuff. However, like what has been mentioned before, there is some slight different in the layout compared to the normal keyboards. Be that as it may, it is only going to take a bit of your time to get used to that minor difference. Other than that, being having £30 voucher definitely going to save you a lot.
Anyway, why don't you browse through Amazon and see what are available with them before you decide?