The Radeon HD 5870 in my wife's machine is still kicking, but has gotten pretty loud over the last year or so (I'm guessing the bearings in the fan are a bit funny at this point). I'm looking to update the card in there. Doesn't need to be any better, but shouldn't be any worse. I'm surprised that the only cards I can find online that meet those criteria are north of $300, almost $400 or more ... which seems weird to me considering the HD 5870 is 7 years old. What (new) card would you guys use to replace the HD 5870 in a mid-2010 Mac Pro?