Re: Video card@@@
Both respectable cards, I wouldn't be too fussed either way. But would probably go for the XFX, simply because I've used them in the past.
Addition: You won't need the extra 256mb, not for a while anyway
My Setup -
AMD 64 3200 +, 256 mb Geforce 6600, 1GB PC3200 DDR400 RAM, 160GB SATA 7200RPM HDD