To be honest keyboards so so cheap - all you need to pay is somewhere between 5 and 10 pounds.

Use it as hard as you need and when its worn out replace it.

I have to say I would buy Logetech also - that applies to Mice too. (Have a nice gaming Logitech mouse with lots of thumb buttons for when playing Call of Duty 4 - sad I know)

Wireless I wouldn't touch - another thing to go wrong when you least want it too.. i.e. batteries running out at the point you really need the computer only to find you are all out of new ones!!!!

Personally I wouldn't be tempted on a really expensive multifunction keyboard with lots of extra buttons and functions - just a straight forward standard one..