I agree that the AAT is pretty nice. Not sure on its scale, but it seems close and they did good with the hatch. I was only miffed at the lack of a "real" interior. The lame-ass feature of the exploding cockpit thing, with the painted figure and all that... Not swift.
To me, the AAT was a pretty solid attempt though...
And E1 didn't have a lot of good stuff to pick from. I think it has the worst ships/vehicles of all the films. I will say that the Gian Speeder is one I'd have liked to have seen done and done properly. The Flash Speeder was a letdown since it was so damn tiny. Nice idea, piss-poor execution.
The N1 Fighter was a bit more the same, as was the Queen's Ship...
Episode II was a far greater effort out of LFL's designers to make "Star Warsy" vehicles. The ships in E1 just fell flat.