So subjective.....
as you can tell by the responses. I think 'favorites' are sometimes what hits your 'I fancy' gut when you first see them. For me it was the turquoise G and then the turquoise 1205. But my very first new Electrolux was the Diamond J back in the 80's. I resisted getting another(ex took the first and left me with the G) Diamond J for yrs.
Then I had some good friends that moved away to the coast and I decided to give them a vac as a house warming gift. I found a nice, low hr Diamond J, went through it, the PN, picked up a Sidekick and gave them the whole shebang. The PO had carpets and never used the wands or floor brush which were virtually new. They absolutely CHERISH that vac....almost to the point of absurdity. He was telling me the other day that he didn't want to take it downstairs and do the hard floors.
Well, that started a 'bug' in me for my own Diamond J again. Plus, I sent my son in Brooklyn my DD 1205. That left me with using my restored turquoise G as my DD....not liking that, I found another nice Diamond J and then another with poorer airflow, but beautiful shape.
Then the mechanical interest part of me 'fancied' the motor in the Super J and so I found one of those. For those that don't know, Electrolux USA put over a million dollar upgrade into their plant to manufacture the new motor/canister. I don't like gold canister vacs as a rule, but this vac is so historically significant that I got one.
So as you can read, I'm all over the place in personal favorite, metal canister Electrolux vacs....lol. Now.....I wouldn't turn down an XXX if someone was to give me one, but I'm not actively seeking anything that old. Seems to me if you got an XXX, you're bound then, to get everything in between that and the last metal series canisters. I've got enough to restore in many other hobbies...don't need that scenario!
Kevin