I need some help deciding on what would be best to upgrade my current build. I'm currently using a Intel E6850 dual core OC'ed to 3.4ghz, along with a MSI GTX 260 Twin Frozr and 4GB of G.Skill DDR3 1333 ram all on a cheap non SLI Gigabyte motherboard. Now i know my processor is ancient (from a older SLI 8800 build from 08) but I'm hard pressed to decide what should really be replaced. I know that upgrading to a i5 or i7 would be the logical thing to do but thats simply too expensive for me right now. Should i keep the CPU and upgrade to something like a GTX 460 or keep my 260 and swap my dual core out for a quad core? and more importantly, which one of those choices would be the most cost effective?