You forgot the best MB out there. The Intel D976XBXLRK - bad axe. It's a bit of a bitch to OC, but it is solid, always quality, and will last as long as your system. Something you can't always say for Asus, GigaByte, or Abit. (This is gonna get me some comments back...)
Everybody downplays Intel's boards and chips (we were all AMD guys before Conroe weren't we), and they used to be right, but Intel's got the best 975X series MB out right now for Conroe. When you read the impartial reviews, they all note that it's not the best OC'er, but it's the most solid performer at std clock. Most people don't OC. heck, this isn't the OC MB forum. In six months, we'll see, but right now there is no better than the bad axe. Oh, it is a bit pricey, but you get what you pay for.
My Rig:
Core 2 Duo X6800 Conroe (Stock Clock for now)
Intel D975XBXLRK - 304
Thermaltake Big Typhoon HSF
2 GB Corsair Pro PC6400 4-4-4-15
ATI X1900XTX
74GB 10K Raptor HD
Soundblaster Audigy 2 SZ
NEC OEM DVD Burners (x2)
Gigabyte 3D Aurora Case
Ultra X-Finity 600W SLi Certified PSU