Well, I'm located in the foothills of NC so it gets somewhat hot and humid, but we don't see 100 often. I ride year round for a total of 5000+ miles, usually. Winterize certainly isn't in my vocabulary, that's for sure. I'm not worrying much about weather when picking a bike, since I'd appreciate the wind protection in the winter with full fairings, but appreciate the wind-cooling of something "naked" in the summer. It's a win/lose either way. Since I ride just as much all year round, the only solution is to own multiple bikes! Now that's an idea I can get used to...
As far as the sport touring goes, I think I'm after somewhat more sport than touring, so I'm loving the FJR, Concours, ZRX, and old CBR1000 suggestions. This will be 99% used for 1-up riding. I try to get my girlfriend to ride with me, but I don't think it's really her thing, so I'm not going to get too hung up on taking her into account. Even if I can get her on the back, I know she'd have no interest on anything more than a day trip, which is where I think passenger/luggage accommodations would really make the difference.
So, in order of sport/touring ratio, would it be something like:
CBR1000
ZRX
FJR
Concours?