Thanks Jim and thanks for the link. The target is $300, but it'll probably end up at $400.
Do you foresee any VW performance or compatibility differences between a Quadro FX3800 and a FirePro M7820?
The FirePro is DDR5, OpenGL 4.1, and has about 6X as many streams/cudas. On the other hand, AMD doesn't seem to have Win10 drivers for the m7820 (which is not a big issue since I'm inclined to stick with Win7).
More differences in the two cards can be found here:
http://www.gpuzoo.com/Compare/NVIDIA_Quadro_FX_3800M__vs__ATI_FirePro_M7820/