It is hard nowadays to even still find or choose any LGA775 mobo.
If you unfortunately need one, just take whatever you can find....even from ebay...
Match your RAM with your mobo...some LGA775 mobo can only DDR2 while some can already DDR3
I thought that Intel would be a good direction to head in so I purchased an Intel Extreme Series DX48BT2 Motherboard and it arrived DOA. It was brand new out of the box. Now heading back to Fleabay for what is left on the used market.