Re: What NVidia-Card for Linux
Personally, I can not recommend NVidia if you intend on running Linux on the machine. The closed-source drivers are a source of endless issues and even if they are ever stabilized, the development model simply is not sustainable. If you are looking for quiet and cool, I would go with an Intel integrated chipset (the X3100 has decent performance and open-source drivers). On the other hand, if you do wish to have something with better gaming performance, ATI's new cards should soon have full open-source drivers and specifications, and will more than meet your needs.
While I have been loyal to NVidia in the past, I can no longer recommend them with the continued difficulty I and numerous others have had with their lack of universally reliable Linux support. I hope this helps and good luck,