crossfire is such a technology that i never bothered with it, it serves no purpose other then to be able to wire 2 video cards to make 1 good one.....or you can spend 50 bucks more and get one good one that can run all the games out currently regardless, also look up sli its a much better consept
I dunno, I have been pleased with my 5850's in crossfire and eyefinity. Every game I play has scaled nicely compared to a single card and I have had no issues other than having to edit some configs to get my core overclocks over 775mhz.
To me SLI/XFire isn't shitty, but is only useful in very precise circumstances: upgrade path for later and really high-end gaming rig that need 2+ of the best cards right now. Getting two mid-range cards up-front rarely seems economical given the $$$ saved often go toward a much pricier MB (at least for Intel CPUs). Recently, some P55 boards supporting XFire have been available for barely ~50$ more than some others, but most SLI/XFire boards still cost a lot more.