8MB should be enough for common resolutions in full color progressive 2D and for DVD. Check the specs to be sure it will do the highest res/colors you need. More would only be needed for higher resolution 3D (and faster 3D rather than using the system memory via AGP). As said the Rage128 is best for DVD (second only to Radeon) and is at least as good if not better than Savage for 2D and I believe it is not available with less than 16MB so unless you really want to save money with the S4 8MB (which is available with faster SGRAM BTW), then prolly just go for the Rage128. It comes in many different flavors (names and configurations and even a faster Pro version) so some research is in order to get the best deal on no more than you need. Also, DVD acceleration is only available in the AGP models, not PCI.