Recomended VGA Card

[Squall]

I do not know AMD cards, but it seems they are bad with OpenGL.

The best card is currently GeForce GTX 750 Ti. However, it will not be enough to support the next generation.
Better cards use too much power and are very expensive. You may want to wait until 2015.

Your processor is very dated if you want to play recent games or the next releases.
A powerful graphic card will be slowed by the CPU. If your current graphic card is broken and you need a card in the same level of your CPU, you may want GeForce GTX 650, because it is cheaper.