For a new board this is the best you can do
ASRock 4CoreDual-SATA2 $59.99http://www.newegg.com/Product/Product.aspx?Item=N82E16813157115
ASRock is the budget arm of Asus but since it seems like the parent company lets them do their own thing they come out with some cool and interesting products. If you want anything better you're gonna have to go on ebay. The Pentium D 940 is already running at 3.2Ghz, and the max a Pentium D dual core can really do on a standard air cooler without throttling under load, usually, is 3.6GHz. If you want to significantly overclock it I would recommend looking into liquid cooling.