I have pulled apart every one in that list. By far the worst was the 12" PB. The Clamshell in retrospect was not that bad, except for reattaching the display (hint: put the three small screws in first), because it is sturdily built. With the 12" PB you are constantly worried about denting/twisting the palmrest/keyboard lid - plus the two fragile, hard to reach logic board cable sockets to detach the keyboard from.
Worse than any of those was the Macbook Pro Santa Rosa. That keyboard/palmrest lid does not come off easily at all with all those clips at the front.