I am looking at AROS as a possible AmigaOS for x86 since MorphOS and its supported hardware are, IMO, expensive for a hobbyist OS.
MorphOS is not so cheap, but it works very very well. I bought my Mac mini at 1.5ghz and 64mb for graphics card for 240€ with Apple keyboard and mighty mouse.
1) Stability. I have had MorphOS 2.4 lose the keyboard on a G4 Mac Mini. I'd have to unplug and replug. Both systems have had odd freezes. Any other stability issues on either side?
I had some problems using a new Apple keyboard, but when i bought my Mac mini it comes with an old version of Apple keyboard with transparent plastic, and it works without problems, some keyboards like newer Apple keyboards doesn't work properly even on Efika.
Aros is getting better and better, but it have to deals with a lot of different hardware parts, i have differents computers, and i can't get working all things properly, i have problems mainly with sound cards, but also with graphic cards. This kind of problems will not happens on MorphOS, because it is ported to a reduced number of hardware pieces, which means that MorphOS team can use their time to improve hardware drivers, and make it running smoothly even on a low hardware profile like Efika.