Yeah mate, that big Moto Guzzi would be my second choice, my mate Pete is a Guzzi nut and I rode his much modified T3 and his LM5 (POS, really disappointing after the T3) and I loved it.
One of the problems with my bevel Duke was the over-heating rear cylinder (common in "Forward/Aft" V twins) and the OEM cast Iron valve guides that would cause the valves to stick, turning it from a twin to a single on hot days. The fix is of course bronze guides with good clearances to allow for expansion.
I had sent my engine to V2 Motorcycles in Brisbane to be rebuilt with all the good bits, but the parts quote alone was around $3K and they wouldn't give a a total including labour, so when I saw a minty BMW K100RT (that I did 25,000 trouble-free miles on before I made the mistake of trading it for an R100RS POS) going for around $5K, I bought it and sold the Duke.
Hindsight is a wonderful thing, but if I could have afforded to keep it, I'd really like to have it now, like my Harley and my Triumph, it really was a unique bike. Cheers, Terry.