I'm in the growing older class like you, I'll be 60 very early next year.
As you can see from my signature, my bike choices are still very much sporting. My 1299S sees mostly track duty in the A group, (I'm still pretty fast for an old guy...
), but like you, I needed something a little more comfortable for long street rides.
I bought myself a Tuono V4 and absolutely love the bike, but although it's not a great bike for loading luggage on, it can be done.
I also had a Goldwing, and although that bike handles pretty well for its size, I wanted something that was lighter and sportier.
I sold the Goldwing and replaced it with the '15 Multistrada. I've been through most of the teething issues, all sorted reasonably quickly by my local dealer, who fortunately is only 15 miles away.
Between my three current (active) street bikes, my R1 and Cb400F are moth balled at the moment, if I had to reduce my bikes down to just one, the Multistrada would be the one left in the garage.
The Multistrada just does everything well, it's comfortable, the 'S' suspension is sublime, it handles extremely well for a sports tourer. Then engine is strong, mine dyno'd at 144rwhp after the 11/15 map update with the stock exhaust.
I did test ride a '15 with the full Termi, the one I rode actually made less rwhp than mine and I didn't like the sound and the extra volume. I was hoping the exhaust note would be more like the tone of my 1098 with full Termi, but the one I rode sounded more like a Honda Civic with a Fart can. So I saved $2600 there, the only benefit, from my perspective, would have been the 15lbs weight savings.
My bike will never go off road, so I don't have any use for the Enduro settings and I use my right wrist to control the motor, so the dumped down Urban mode is redundant.
I don't think you'll be disappointed, I look at all the new bikes coming out and I can't see any offerings that would make me part with the Multistrada, the KTM 1290GT is tempting, but for my purposes, arrived 15 months too late.