ATI Radeon 5850/5870/x2 Buyers guide read!
At the moment there is no need to choose which brands to choose for you 58xx~ Powercolor, XFX, Palit, Gainward, MSI, Sapphire, etc.
Because all of them use the same referenced cooling, you will have to wait for 1 month or more for new cooling systems like Sapphire's Vapor-X/Atomic-X.
5850 and 5870 should be available now!
If you are planning to buy a 5850/5870/x2, please check the measurements of your case if the 5850/5870/x2 can fit properly inside, if not you might have to buy a new case which is a very big problem indeed, or mod something inside!
5850 is 24cm
5850x2 is 28cm
5870 is 27cm
5870x2 is 30cm
Also lastly don't forget to check your power supply if it can handle the needed watts for the 5870. If not you'll have a problem even turning on the computer.
5850 = 170 watts max full load.
5850x2 = 340 watts max full load.
5870 = 188 watts max full load.
5870x2 = 376 watts max full load.
NZXT Lexa-S & NZXT M59 with 5870
green shall fall! red tide shall rise! lol~~ haha
have fun with your 58xx
one last thing
Nvidia may have batman, but ATi has the batmobile.