Thanks for the replies...
At this point, I am still weighing my options. I certainly like the classic lines of the W126 and would be happy with one, but I have also driven two W140 and enjoyed the way they handled as well. That is why I posted for opinions...I knew of the timing chain issue with the W126's, but I know very little about the W140's quirks. Budgetary constrants on the purchase will probably hold me at or under $15K. I was thinking of a '91 420SEL with some cash left over to change out to Euro lights and do some preventative maintenance upfront.
'86 Alfa Romeo Spider
'84 Harley Davidson FLH"X"
'70 FJ40 Land Cruiser (basket case)