I like quirky scopes, A porter as mentioned above, Edmund Voyager, Swift 838(50mm) and a TV76. I'd really like to find another Celestron(Vixen) 4", shouldn't have sold the first one! Though i'd take the 80mm version.
An easier answer to the question "What classics do you want before you die?" would be, The next one i see that i haven't tried out before .