If you're thinking about a sports-tourer, why not try a VFR Honda? All the V-twin type torque you're used to, but it still revs like a four. My VFR pulls from 2,500-12,000rpm without a glitch - in top gear! Fit a decent exhaust, and it'll even growl like a Ducati.
I would work out what you want the bike to do first. Do you still want a sports tourer, or something more focussed. Or maybe going in the other direction do you want more of a full dress tourer. Do you use it for commuting? Do you use it through winter? Maybe you'd be better off with shaft drive for big winter miles? If you still want a sports tourer, what end of the spectrum do you want to go for sports or tourer? How much luggage do you want to take with you? Solo or two-up?
That would be what I would want to work out, then find the best bike against those criteria whether it ended up being a Hyabusa or a Harley