I recently changed from an XFX AMD 7950 to a Zotac NVidia GTX 980. It works very well on my three-screen rig:
http://kenshelby.us/docs/pc-parts.htmI have the Aces High in-game Anti Aliasing set at the first click (maybe that's 2X ?), textures maxed out, most of the Advanced settings turned on, but environment updates turned off. FPS holds steady at 58-60 all the time. My card temperature has never gone over 60 C. A bit pricey at US $550, sure, but it does the trick for me.
