I decided to go for 8GB so I can do 4x2GB and utilize the quad channel memory controller on the 5000x. Now I need to consider a new case. The MB will fit in the one I have now but it has seen better days. Probably time for a new case anyway.
I think it's interesting Microsoft is basically paying people to use live.com with this cash back program. I doubt I'd actually use live.com but I do think the way they handle their frontpage is neat. The search box has a background image that includes little mouse-overs. The one I saw today was some rope bridge over a gully and the mouse over was "How are rope bridges made?" Neat idea.