the only thing that should have been different with the 2000 is it should have had an '020 cpu out the door instead of releasing that later. The 1000, 500, and 2000 were really pretty much the same computer, with different form factors and expandability.
the 2000 was really ugly though. not sleek and cool like the 1000, 3000, or even the 500. as workhorses go the 2000 is a clydesdale thats been kicked in the face be a bull.