Great video. I think both ega and vga look good, depending on the scene (I prefer ega backgrounds but vga close up).

The music however, floppy is best and the cd version is the worst. I played with the internal speaker myself. The cd music sounds off to me, but cannot pinpoint why exactly.

Cga seems to be 1-to-1 conversion of ega. It only looks bad because of the strong cyan and magenta. But thats a hardware limitation not an artistic choice.