I vote ~ and my wallet would vote several times ~ for the Fishbowl!!! As iconic a bus as there ever was from the late 50's through th 70's! What city transit system did not have 'em?? The Fishbowl is an all-around city transit bus with numerous applications; besides city transit, many were used for school buses, team transits, bands, prisoners, troops, you name it.
We already have a modern bus - Revell of Germany's recent kit. The Prevost is nice but a bit redundant to that one, and both are over-the-road passengerliners with more limited applications.
Of course, the best of all worlds would be to have both ~ but when is that ever gonna happen?