I'm fairly sold on the Supermicro C7X58 but I will hear suggestions. The only concern I have on it is all the other slots will be blocked so I couldn't add a sound card. About a non issue I think as the new board onboard sound should be fine for me, only reason I have a sound card now is my current board didn't have an optical out (which I'm not using anymore), and this board does have.
The GA-X58A-UD5 looks about perfect but is another $60 price premium at the moment, kind of waffling on spending more for something I won't want or need down the road. I'll start reading up more on this board.
I looked at the gigabyte GA-X58A-UD3R and I don't like the way they step the video card channels down to 8 lanes if you stick in another card.
This Intel DX58SO board here has some crappy SATA connector placement, plus I read on another forum there were some buggy firmware versions out there for it. Also got put down as to not having as good a power supply regulation circuit as other boards in the same price range and doesn't use all solid caps. Basically the more I looked into it the worse this board got.