I still think you should get an Intel Core 2 Duo
, like I said it's about the same price as the 5000+ but is a lot better.
On the other hand I also read that motherboards for the conroe are more expensive than AM2 motherboards, but that was some time ago, don't know how it is today.
Found this interesting chart tho.
EDIT: I also think it might be better to take 4x 512 to get to 2 GB memory, use that with Dual Channel and you'll get better speeds than 2 x 1 GB and it might be even cheeper.