you are welcome. if you are into benching, then get the 7970. if not, 7950 will suffice. i did try crossfire and i was surprised how easy it was to setup. C3, BF3, and C2 were the only games i played and were all smooth. Valley, on the otherhand, was not but i don't play that 'game' anymore.
edit: i did not even use radeonpro or synched my cards. they ran on their own clocks (7950/7970).