I was going to buy a Sapphire 7870 XT for £218 (http://uk.pcpartpicker.com/part/sapp...ard-111992020g) but saw this XFX with the same specs for £161 (http://uk.pcpartpicker.com/part/xfx-...ard-fx787acnac), is there any reason I shouldn't go with the XFX? Is there a better graphics card available in the £200 range? It will be with a new i5, 16GB RAM and will be used mostly for WoW and future MMO's