> I would fully expect MorphOS to play the same video files with the
> same level of performance as on OS4 with the better video card.

Doubtful. With A-Eon's drivers, which every X5000 owner should have, OS4 can delegate the video decoding to the GPU via VA-API, causing virtually no load to the CPU. This was added about 3 years ago. Of course, the player software must support this as well, which are currently Emotion and DvPlayer.