http://www.newegg.com/Product/Product.aspx?Item=N82E16813128346
thats one.. Depends how much youre willing to spend. I'd suggest going either that one or one of the other EP45 series from gigabyte. Nice boards.
Or
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128358 (it has an award! :O) Lol.
Thats my 2 cents. Personally unless youre in real need of it, wait out for a while til i5 =D. Then upgrade the entire system woot lol. If you're happy with yours though, then I suggest one of those boards. Just type Gigabyte EP45 into newegg and most of the other models are there too if you want a cheaper option. Goodluck