You could get a Radeon 7850 by the way. Tends to be cheaper, while still being on-par with
a 660. An MSI Twin Frozr version is always awesome for GPUs in my view. Of the 660s you put
forth, I imagine you'd like the Gigabyte one in particular, if you're not going to OC things yourself.
But I don't know really. I think they're much the same, those 3, so I doubt you'd feel a difference. http://www.tomshardware.co.uk/gaming-graphics-card-review,review-32760-3.html