AM2 or 939?

I'm building a computer for the first time, using an Athlon 64 X2 4200+, an nVidia  (eVGA) Geforce 7600GS (512MB, GDDR2, etc), and I'm wondering, should I go for Socket 939 or Socket AM2?  I'm hearing that its not worth the cash, but I'm not seeing much price difference in anything but the Memory.

What do you guys think?

>.>
I have nothing against Intel, myself, but right now I want an AMD-based computer.

In anycase, I'm gonna wait on the processor till Conroe is released (I'm hearing massive price drops are coming.  *rolls eyes*), but I'm not sure about the graphics card much anymore.  About how long off is the release of nVidia's 8000 Series?