Murph,
My three cents: You must have a visceral or emotional reaction to your next ride. Otherwise, just get a Vespa and have a nice day. I say this based on having had a burning desire for the original ninja, then buying a new '86 model, enjoying it (sometimes illegally), realizing it needed to be green and 94 horses weren't really setting the world on fire, getting t-boned by a ford ranger, not buying another ninja, finally trolling craigslist for the damned things and finding an original '84 in super shape for a pitance. I tried buying practical and economical bikes and found that they bored me to tears and they stayed parked a lot.
My Connie ('08) is definitely the best bike I've had so far and I would buy another if that becomes a necessity. I originally wanted a K12GT, but after reading up on them and then testing several I discovered that airbox/stumble/crappy running issues were real and I wasn't going to buy into that money pit. I do like the K12's ergos (bars/grips/mirrors) a little better and the cruise better still, but my Connie has more pop so I can't complain...much. The K16 does appear intriguing but it weighs how much?
What has been your favorite bike and why? Maybe that will help with your deliberations.
The heat and jewel roasting/irradiating issues are minimized if you ride hard quickly.