Considering its heft and wheelbase, I've always been impressed with the handling of my 97 Sporti. Granted, it doesn't like tight switchbacks, but is supremely stable through fast sweepers. I had the rear shock rebuilt and the front forks raised, so it's a bit more compliant on the bumpy stuff, and turns quicker, too. This bike has been all over California (and parts of Nevada), including a run up & over the Sonora Pass last year, where, I might add, it handled like a dream.
I'm still undecided on this new prototype. Kinda beefy looking, but that's the essence of a streetfighter, right? And the old 4-valve engine is sweet. What Guzzi (and Aprilia) really needs to do, however, is develop the next generation liquid-cooled V-twin. With more activity at the factory of late, this looks like a real possibility....