what you want to do with that system, gaming or editing?
If gaming then grab 2500k. Also would you want to overclock it?
I want to use the system for gaming only and want the system to run for atleast 5 yr time period
the i5 2500k doesn't support pcie 3.0 so will it affect my gaming if run my graphics card in pcie 2. Will there be a huge difference in its performance from pcie 3 to pcie 2