Motherboard selection help?

Hi All,
I am using the below board/processor:

board(Intel DG31PR Motherboard):
http://www.tigerdirect.com/applications/SearchTools/ite...

Processor (Intel Core 2 Duo E6550):
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

My board is having some problem. If I go for another board then what I should check in another board for compatibility? Should I go for DDR3 supported board as currently I am using DDR2 only?

Thanks.