I think any of these would be a great choice.
i read the sprint had brake issues that were being addressed so that might be a factor.
i sat on a 14 a couple weeks ago and i would love to ride one. It fit good. I guess i don't know how heavy the 14 is and that shouldn't play a huge factor in a sport tourer, but it matters a little. i can tell you this, its physically a big, long bike. so it should be stable. i have read that even so, it is relatively quick in the bends.
the duc is sublime, especialy with a power commander. is the s4r a four or 2 valve? i'm guessing its the superbike 4 valve motor. if so you'll get a kick out of the 2 valve's low end.
i hestitate to recommend the sport tourer i prefer but here goes. a vfr.
it has more character than people think, and its really a good fit for me at 6'1". the power is kind, and while it has a wierd engine braking, drive train thing going on where it wags a little in the rear instead of hops, its a really good bike. the barcalounger of sport bikes. and the vtec shouldn't be on a motorcycle as long as it works the way it works on a motorcycle but its easy to ride around. it works great as a sport tourer. nice all around compromise.
i'm also curiuos about the 07 tiger. that might be a candidate too. perhaps a little to much of a standard. but those triples are nice.
no matter what, its fun thinking about a new touring bike. motorcycles are so good these days.