Well, you can see my setup in my sig. I have the same board, and just bigger dimms of the same ram. I looked at the market, and this is why I decided on the upgrade now. As far as I know, the nForce2 supports FSBs of 200Mhz, so the new cpus should run just fine on it. That's the nice thing about AMD, and that they try to make their CPUs backwards compatible. They may not work as well as if they had a proper motherboard, but they will work. Gotta love that socket A!. Intel makes you get a new motherboard each time you want an upgrade.
My system is setup this way because it is to be a "do-all" system. I'm purchasing an RME or Audiotrak soundcard, and maybe a GF4Ti4600 off E-Bay (they're going for really cheap now). It's to be a DJ/sound studio system, as well as a gaming/HT/office/authoring system. It's well on it's way now.
In six months, I might be getting a new CPU anyway, at least if there is a significant performance increase (like 30%+), but that is unlikely.
XP 2500+ Barton
A7N8X Dlx
2x512MB Corsair PC3200
MSI GF3 Ti500 w/64MB DDR
16x DVD-ROM
2x80GB 7200RPM Maxtor
Onboard audio
My computer is bigger than your computer....