i will buy a 760 2gb over clocked
Sounds good. If you are not in a hurry you might wait and see if any Maxwell news come up. The 750 ti has already been released, though the 760 is a much better choice for your system, as it is faster and your PSU is very strong. If higher end models of the Maxwell series will be announced soon, it might be worth the wait though. Since we don't know any details about the other releases you might just go and get the 760 now. It's really up to personal preference.