@pampers
Well, I have only scratched the surface of MorphOS, but so far it has been a much better experience than AROS concerning stability and looks. Ambient is really nice, much better than Workbench (OS4). The preferences are a complete OSX rip-off though and although it looks fantastic, I don't think you can get away with this.
Oh, and where did the 'test sound' button go in audio/AHI prefs?
I have seen some gfx glitches with the shell, but that may be due to my old and unsupported Radeon 7000 with 32 MB memory. I'm getting a 9600XT with 64MB this week.