ok guys I decided to stick with just changing my graphics cards...
I'm going to overclock the nuts off my i5 2500k sandy (its currently sat at 4.6ghz @1.3V I MIGHT be able to get it to 4.8ghz 5ghz is a dream shot... if it causes bottleneck I will go and buy 2600/2700k CPU's)
also what graphics shall I go for hot 290 in Crossfire (cheaper main selling point) or cool running 780gtx in SLI OR a single 780ti
another question my MOBO is the PCI 2.0 series would it be a disadvantage to the PCI 3.0 (is it worth upgrading the mobo for the PCI 3.0)
I decided this because thought I "hold out" until the next GPU architecture