You might want to just get a 2500+ and A7N8X for now, and then upgrade later this year when PCI Express and DDR II come out
Save some $ now, and get a kicka$$ machine in a couple months. Plus, by then then 64 bit chips will be much cheaper hopefully!
The 1Gig of RAM is definitely worth it, RAM prices have come down quite a bit in the last month or now, so its a good time to buy