Originally Posted by
Drakoes
Whereabouts in EU are you btw? Do they have a Sapphire non-reference model on the shop that you're looking at?
Also, are you willing to overclock the GPU as well? It's worth mentioning that these new AMD HD7XXX series and NVIDIA GTX 6XX are very OC friendly, letting you get a lot more performance out of them very easily. Personally, I would not go back to the older generation as these latest gen are really good performers, whilst still being able to use less energy due to their more efficiently designed process.
WoW isn't on this GPU comparison list, but here's a rough idea of just how big the difference is between the 5750 and 7850: link1
and here's a 560TI vs HD7850 if you're interested regardless: link2