Need quick advice. 40$ nvidia that works perfect with Ubuntu?

view full story

http://ubuntuforums.org – without blue people in flash problems or performance problems? Currently on Gigabyte GA-880GM-d2h with integrated radeon 4250 which is awful. Have AMD 970BE, 4GBRAM, Corsair VS450 (450watt) psu. Need a card to run Unity well, and some light gaming, snes games on zsnes @ 1440x900 and source games like half-life 2. Thanks. (Hardware)