Well, a 68k emu can be very fast, as we all know This is exspecially with MacOS, they had to emulate 68k since MacOS 9.1... I've tried years ago FusionPC on a PC with 233 MHz. It was not much slower than my 68040/40 A4k. The fastest 68k Mac of all times is something usable I would like to have on my Peggy.

With MorphOS there is a trouble that there are no api to use the MMU yet, on the other hand you don't see much of a memory protection in the a-box, because any Amiga-app is able to crush the system. Hm.