AMD 7850 2GB vs nVidia 650 Ti Boost
According to Guru3d.com
650ti boost consistently comes out on top.
Techspot.com says the same.
Then again by PCgamer.com
Long story short... Nvidia came out hard with new cards in better price brackets. Currently they are the way to go.
Anyway, that 7850 is in the US, so not a good option. Here's a better one.