Well in all honesty I have no immediate plans to go SLi, but the features of the board (which non-SLi don't seem to have) seem worth the slightly higher price, and at least I have the OPTION to go SLi in the future.
There's a non-SLi Abit board which I was considering, but my last 2 Abit boards have died horrible deaths and can't help but feel like I should try a different make.