If you don't play games pretty much any nvidia or ATI card will do. With amount of vid ram, most cards are starting at 64M minimum and unless you use applications such as games or professional packages that use openGL it'll be more then enough. Personally I prefer the image quality of ATI but it's so close you can't go far wrong.

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Toolset: Blender, GIMP, Indigo Render, LuxRender, TopMod, Knotplot, Ivy Gen, Plant Studio.