You have to pick your application...if you want the best traditional Amiga...I say a heavily expanded A4000T.
If you want the best Amiga that was not an Amiga..Pegasos 2 G4 with MorphOS...hands down the ultimate in the evolution of the 'Amiga' platform.
Props go to AOS4 on the AmigaOne as a close second.
This post surely isn't very helpful
