mingle,
I'b be interested in getting a new PPC system (as opposed to a PPC card for my old machine) and have noticed that there are currently two real choices: An AmigaOne/Lite or a Pegasos II.
Wayne suggested you go to a number fo sites to make comparisons. I suggest you also spend some time over at amigaworld.net. It's like being in entirely different parallel universes when you read at amiga.org and amigaworld.net.
I try to read at both and distill some sense of reality out of the whole Amiga situation.
That being said, I admit to owning an AmigaOne already. Never had a DMA problem. Never had any trouble with it at all, really, except munging up Debian through my own lack of Linux knowledge.