I would have to agree. The problems could've been driver related and from the past, but I think the 6850 is in an odd place at the moment. There are better selections. As Harsh60 recommended, I'd look at the 560 and 7770. It depends on your budget.
Even a better deal right now is the Zotac AMP! GTX 560 Ti ($199.99, $169.99 after mail-in rebate)http://www.newegg.com/Product/Product.aspx?Item=N82E16814500196
It currently is stronger than the regular 560 and 7770.