Building (more so upgrading) a rig for a mate and he's given me an ample budget but he also has components from his old rig that I can use and after getting the other upgrades he's got £150 left on a GPU but said he will stretch to £170 if needs be and with the prices of AMD's cards sky rocketing and nVidia lines being a bit on the pricey side ( cheapest GTX 760 I can find is http://www.dabs.com/products/zotac-geforce-gtx-760-993mhz-2gb-pci-express-3-0-hdmi-8SMR.html?utm_source=awin&utm_medium=affiliates&utm_content=AW00&awc=3044_1389006369_96cfd3476895c7f0b9d330477b3e461e £172 ) Him and I are having a hard time deciding so any help would be appreciated and so would bench marks.