Re: new parts
You need to clear up what you're asking... I assume you're asking what video card people here would reccomend? Then with the 512mb part, I assume you mean system ram? What kind does your system use?
Now, I don't know much about current video cards, but if you just plan to upgrade one of those, va video card would be your best bet for better performace.
Desktop: Athlon 64 3700, 1024M RAM, GF 6200 TC 256M, 2x 80G, 2x DVD-RW
Laptop: Sempron 2800, 512M RAM, Unichrome, 60G, DVD-RW
Macintosh:G4 1.33GHz, 512M RAM, Radeon 9200 32M, 40G, DVD/CDRW
They get me from 0 to 1...