XFX - run loud and sapphire,as heard in many reviews on newegg
also runs hot than sapphire
BUT XFX HAS LIFETIME WARRANTY,but i have heard that Ati has stopped or gonna stop the production of 6xxx series so there might be a time when no card is left for warranty claim.
for more reviews read on newegg.
another suggestion-if you can wait for a month or two,till the launch of nvidia gtx 660 the price of hd7850 will drop surely,then you can hd7850 for few more dollars-around 180$-200$.
If I can't wait till then, the sapphire 6870 is the one I should get?