Thanks, enjoy whichever card you select too ^^
I really liked my Asus 5850 for its out of the box OCing with ability to alter the GPU voltage. Mine went from stock 725core/4000mem 1.087v to 913/4800 on 1.2v
They all can be OC'd but some take more fiddlying about with. Most like to use MSI Afterburner (need to modify its config file with "enableunofficialoverclocking set to 1")
Also all the major card brands are "just" releasing (most during this month) refresh models with new game bundles like :Powercolor ATI Radeon HD 5850 PCS+ "CODMW2 Edition" (also Dirt 2 with it)
£234.99 or $352.96
Am not a fan of Powercolor but is a great deal with both those games at that price!