Well, I just went ahead and put together a list. You can choose based on your budget as any of the following would be a great choice:
MSI 880GM-E41GIGABYTE GA-880GM-D2H - Note that this one only has two slots for memory so you would need two 4 gig chips for your memory. The other would allow for 4 chips of 2gigs which would save you some money. Your choice really.
ASUS M4A88T-VASUS M4A89GTDAlso, not sure if you have chosen a case, but I highly, highly suggest one of these. You won't be disappointed.
Antec SONATA IV - I would say take this one over any others for two reasons: 1. That is a great power supply. Can't go wrong there. 2. The 120mm fan is a safe bet. The smaller fans have crappy bearings that tend to wear out and make noise after a few months. One 120mm fan with the correct design like this case will do more for your cooling than 2 60mm fans that will make tons of noise. This case is virtually silent and has a filter for the incoming air. I own one, trust me it is the best you will find!
Antec Sonata Elite - Basically, same as above minus the power supply.
Antec Sonata Proto - Same as Elite with one less air filter.
All together, if it was me I would take the ASUS M4A89GTD and the Antec SONATA IV. But at least you have some options.