yes, get a crossfire board........great advice.
first off, as everyone already mentioned, SLI and Xfire is a waste of money. Secondly if u ARE going to SLi or Xfire, wtf would u do Xfire? SLi is way better. Thirdly, if u are going to SLi why wouldnt u get a DFI Lanparty UT Ultra-D, all u need is a dull pencil and BAM u got SLi.
Dwayne good choice on the DFi Lanparty, dont forget to post pics and benchmarks.