The 550 would be my choice too. Honda made some really nice small to mid sized fours in those days. Remember the CB400F with the beautiful 4 into 1 exhaust system? That may have been the prettiest four ever made.
I do. They were beautiful.
"Extremism in the defense of liberty is no vice.
And... moderation in the pursuit of justice is no virtue.''
-- Barry Goldwater, Acceptance Speech at the Republican Convention; 1964