The best looking Bimota is the one you have in the garage!
Now if you happen to have a number of them, then its a personal choice.
My favorite Bimota is the Tesi 3D.......it has great looks as well as one of a kind design....a fantastic blend of form and function.
I know that the "strange" looks with out the front forks that are so familiar to motorcycling, is not loved by all. But the fact that Bimota has made this double swing armed sports bike to me is a real plus.
In person the Tesi 3D is a real masterpiece. Not just the styling, but the level of workmanship that goes into the bike is of the highest level.
Another favorite for me is the Bimota SB8RS bike. It has extremely female like curves and lines in its design. Its really pronounced from a "birds eye view". Looking down on the bike you can really see the hour glass shape. It almost as if the designer was working with a female nude model when doing the clay modeling of the bike.
But if we get right down to the bottom of this inquire......any and all Bimotas are beautiful (except the French LSD designed Mantra DB3......)......much more that the average bike.
The italians just have to make things with an eye for beauty beyond just the functional. Thats why all my bikes (except one....a BMW), are Italian, and 4 of them are Bimotas.