If you want AOS4 buy an AmigaOne
If you want MorphOS buy a Pegasos
If you want AROS buy a platform with a port available, x86 at the moment
If you just want to run systemfriendly programs at faster than m68k speed NOW:run UAE or Amithlon on x86, buy a Pegasos IN THE FUTURE: A1 with AOS4 is another option
And finally
If you want Amiga buy an real Amiga with customchips and m68k :-)
It´s as simple as that :-D
Don´t you remmeber what got us in this situation( being without modern machines and a modern os) from the start?
For me AOS or MOS will only be a temporary solution until I can get a fast and integrated emulation for m68k-apps in AROS. When that comes( in 10years time or so :-) ) then both MOS and AOS will be facing a quick death. :-D