Some suggestions of boards I don't know anything abou but which are very cheap and should satisfy your needs (if you don't want to upgrade the CPU that is):
-MSI PT8 Neo-V
-Asus P4S800, any type of board
Aopen has some really cheap boards, so does ASRock but ASRock isn't really like "widely recommended"....
This is just a result of a quick search, wait for some more reactions..