You are right on about the assessment of the previous Duke (known as the Duke II). My brother had one. The new one is night and day. From the great fuel injected engine to the much better ergos and chassis, this one is a winner. The old one was great for going out for an hour or two and acting like a hooligan. You can still do this on the new one...but you can do it all day. Or just cruise around and tour. FWIW you can also get a "touring" windscreen and seat for the new 690 Duke.
You've got a pretty good list there. I'll add a couple:
I think you must check out the Honda VFR800 VTEC. Great engine (V4 anyone?) great ergos, great sound! Comfy yet sporty. Safety features include linked braking, ABS and super bright headlights. And you can get factory hardbags if you really want to do some touring.
This one I haven't rode yet...the Kawasaki Versys. It's a small adventure tourer. V-twin power. Supposed to be a great all arounder. Or try the Versys cousins, the ER-6N (naked) or ER-6F(faired) These are known as the 650R Ninjas over here.. Same engine, slightly different chassis. More of a standard bike..like your FZ-6. Twin power though! Modern twins have great power and torque..and personality.
BMW R1100S (this will be a used bike. The new one is the R1200S and is much more sporty. The 1100S is a better all arounder IMO.). I'm not a huge fan of the BMWs, but after riding this bike (my brother also owns one of these) I can really see the appeal. It's sporty, has a really fun engine, good ergonomics, maintenance-free shaft drive. It can do the sporty stuff or be set-up for touring duties. My brother has gone on several tours with this bike and it has never left him sore or stranded. Multiple different luggace/packing options for this one. This one makes up for what the F800 lacks...POWER. I've included a pic of his bike from one of his day tours.
KTM Super Duke. You just HAVE to try this one. One of those bikes where you just say "WOW". I am truly smitten by this one. Locomotive power and torque from the amazing 990 twin. And amazing traffic stopping looks. Steep price tag though.

I have seen them for $11K used though.
