I'm getting a new card to replace my gf2 mx. I'll be using it in school for CAD and 3d modeling as well as for games. I don't however use any of the specific programs that the Quadro line is geared towards. I've heard ATI cards aren't as good at openGL and so I don't want to risk it. That said, what's going to be the best bang for my buck in terms of video card. My options seem to bethe gf4 ti4200 for around 140, the fx 5600U (new) for around 200-220, or the 5800nu for around 260-270. What do you guys think?