Okay, well the way I see it, if you are going to upgrade the motherboard, you might as well ditch the crappy value ram in the machine current and get new cpu, mobo, and ram.

The AMD quad-core black edition runs about $160 and about $115 for a nice motherboard.

cpu: http://www.microcenter.com/single_pr...uct_id=0325957
mobo: http://www.microcenter.com/single_pr...uct_id=0323771
ram: http://www.newegg.com/Product/Produc...82E16820231193

I do not like Micro Center for ram. Problem is, those upgrade might warrant a better PSU. Also, if you could spare about $70 more, the Intel i5-750 system would be a touch nicer.