@kedawa
As allready said in the thread, if you want to run OS4, get an AmigaOne or the new Amy-board (
http://www.troikang.com ), that are about to go on sale soon.
If you want to run MorphOS, get Peg2.
If you primarily want to run Linux on PPC, on non Mac-hardware, get a Peg2, since the Peg has a lot better Linux-support than the AmigaOne has.