XFX Radeon HD 5770 1024MB DDR5 PCIe x16.
Try to get the "577A" model. This is the reference model, and has the enclosed cooling schroud, venting hot air out the back of a PCI slot in the case.
If you have good case airflow to begin with a card that exhausts outside the case isn't necessarily the best choice. The card you recommended is also over the budget the OP has stated.