Personally I only change MB when I upgrade CPU, but if you insist, then read on.
Have a look at the EVGA 750i FTW board. Newegg.com - EVGA 123-YW-E175-A1 LGA 775 NVIDIA nForce 750i SLI FTW ATX Intel Motherboard - Intel Motherboards
It's served me well for a year. It has a few flaws that I have to mention though.
First is the Northbridge fan. It's 50-60mm, can be very loud, and blows the hot air right on the back of the GPU. I recently replaced it with a Vantec Stealth for 10$ and that worked very well. You can read more about this in my posts on this page: http://www.sevenforums.com/general-d...ur-rig-41.html
Second is the HDD LED header. From what I've read on the EVGA forums, it doesn't supply enough power to light up the HDD LED on some cases. I've used this board for an Antec 300 and ABS Monolith and both have this problem. There's also a fix for this. You can rotate the HDD LED cable of the case so that it uses the (+) pin of the POWER LED and (-) pin of HDD LED. Not a deal breaker for me. The HDD LED was both HDD and power indicator for the Antec case. Now I even removed the front door of the ABS case and only listen to the HDDs for their activity