Summary: I'm running two of these in a linux box (Scientific Linux 6) and am having absolutely no problems with them. They just run X, no games or anything and, yes, on the date I write this the 5830 is yesterday's tech.
Summary: If you plan ever to have more than one monitor, don't buy this card. Once you add the second monitor, you will experience flickering and tearing. ATI has not solved the problem after a couple years. I doubt they will any time soon.