I gave up on a PPC AmigOS when Phase5 went under. Say what you will about these guys, if the owners of Amiga at the time had supported them by allowing a port of the OS to PPC then things would have been much different today. Instead Amiga Inc just tried to milk the loyal 68k Amiga users for everything they could and in the end apart from OS3.9 (in 10 years since commodore died) they did nothing.
As for moving over to the A1, my 68060 A4000 does everything i need it too, and the only thing I wish for is ibrowse 2.4. If I want a fast amigaOS environment i run winuae but thats just for the hell of it not because i really need to.