Man, that whole category of motherboards are hurting. I had to replace my nvidia based board, and instead buying the crap that is out there that is nvidia + 775, I just dropped SLI and got a P45 board -- and I'm loving it.
For your price range... I guess you could pick up something older, like a nvidia 600i series mobo (cannot find those on newegg though).
Unless you up your price (look at these 700i series boards
... lowest around $120), you not going to find anything worth spending money on, IMHO.
(as you start getting sub-$100 on nvidia boards, they begin to not have SLI)