Some great replies guys thanks! I am going to go a little research on the specific GPU's above and to see when the new GTX is released because by sounds of it waiting for that to release might be the way forward.
In terms of what to mine, I still have to make a decision between ETH, PIVX or the 100s of other coins. I am in the process of downloading WinMiner now so I will get back to you soon.

Thanks again