Treat yourself and get the Guzzi, a bit like two singles a once! Easy to work on, cylinder heads are unobstructed , dead simple technology and shaft drive, no more messing with chains. I've known of some with over 300,000 miles on the clock.You may have guessed that I have one, the handling is a bit slow and the torque reaction when you blip the throttle at standstill can be a bit odd at first, don't be put off, they grow on you. Not as nimble as a single but great on swinging 'A' roads. If you want to see a nice Guzzi single, go to R.O.S Guzzi, a German site, they have taken a 500 Falcone and turned it into a 750, looks nice too, Babel Fish translation is hilarious.
Jez