Are we talking in order of size? If so...
1. K1000
2. HD800
3. HE60
4. K701/2
5. HD600/650
K1000 is larger than HD800 IMO, but sounds more realistic. HD800, as another poster put it, sounds like an aircraft hangar.
HE60 is very large, but smaller than the HD800, but also better quality.
K701/2 is large, but just sounds totally wrong. Overall they aren't too bad though.
HD600/650 is about the same as K701/2, but presentation is superior. It gives a more intimate feeling than the K701/2 so I put it 5th.
Overall I'd say the HE60 really nails it on soundstage. I need to hear more phones to declare it best overall (IMO), though.
Edited by Maxvla - 8/1/10 at 1:22pm