I always had an admiration for the Supermarine S6b, the one that won the Schneider trophy for the 3rd and final time.
http://www.airracinghistory.freeola.com/Schneider.htm
Not necessarily pretty, but truly classic lines, and what a pedigree!
I'm with Genghis on the Valkyrie, probably the most extraordinary looking aircraft, certainly for it's time.
http://www.wpafb.af.mil/museum/modern_flight/mf37.htm
all this and M3.1 at FL730 - wow
