I always thought the Norton Commando was the most beutiful bike ever built. The riding position was damn near perfect, and it had gobs to torque, even though it maybe ran out of breath a bit earlier than the modern competition.
I still think a modern, high tech version of that bike would find a place in the postmodern world. After all, the Ducati Monster is a huge sucess, as is the SV 650. They are bikes that can be comprehended in one look, and they deliver the goods. Here's hoping someone figures out a way to get them on the road.