Natively running AROS on it would make it an Amiga for me.
I'm totally with Nicholas here. AROS is built to the same design patterns that AmigaOS and even has 1.3 compatiblity (wierd BCPL stuff thanks to Jason and Toni)... It runs on x86, x86-64, PPC, ARM and 68k... It's hard not to like AROS, unless you have a severe learning difficulty :-/