So I recently made the mistake of buying the $150 sapphire 5850's on amazon, and within a month the fans were destroyed (bearings are done).  Meanwhile I have a 6850 that's been running for months by Power Cooler and the fan is not only effective (never goes above 65%, heat peaks around 80C), but also quiet.

So I'm wondering, are there specific brands or cards that have notably better cooling/fans than others?  What are your good/bad experiences?

Thanks,
Daniel

Note: I'm talking about mining 24/7