Okay, at that budge price, I would say a 6670 with DDR5 is within reach. Don't worry about the size of Vram (1GB vs. 2GB), at the price point, go for something with more rendering and shading power. http://www.amazon.co.uk/Asus-Radeon-Graphics-PCI-Express-Dust-proof/dp/B004XANO24/ref=sr_1_8?s=computers&ie=UTF8&qid=1342990529&sr=1-8
is just outside of your budget (69 instead of 60), but it is a solid card for that price.
IF you can reach a bit outside of your budget, a 7750 is your best bet. It is by far the best deal for performance. The 6670 is your second, although inferior choice. If you do go with a 6670, be sure it has DDR5 instead of DDR3, no matter how much VRAM.