And am debating (have another post in the ram section) ram (basically 2gbs of DDR2 PC2-6400):
OCZ 2GB DDR2 PC2-6400 VISTA UPGRADE EDITION
Crucial Ballistix 2GB PC2-6400 800MHz DDR2 Memory
Corsair TWIN2X2048-5400C4 2GB DDR2 XMS2-5400
Dude do yourself a favour, get the MOBO and instead of the 3800+ try get something bigger, like the 5600+.
for your video card go for the XFX nVidia 8600 GT/GTS
as for ram the corsair twin is some phenominal stuff, but as for the board, you cant go wrong. if you dont come right with the XFX MOBO get yourself a gigabyte.