ok that sounds good, but i heard some games have trouble using CF. Mostly i will be playing FF XIV w/ eyefinity (When i can get the money for the xtra monitors), has anyone heard if CF will down grade it to jus one 5770 or should i jus stick with the 5850?
Some games do have problems with scaling in Crossfire. I have no idea about FF XIV. I like a single more powerful GPU over 2 in Crossfire personally. That being said many people go the other route and are happy.
As long as you have a 550w or better power supply you can always get a 5850 and add another later if you need to without upgrading anything else. Prices should drop sometime soon as the 6xxx series is released and Nvidia is finally getting some great new cards out to compete.