Australia/NZ was at the top of my list, but DH is 76 and has some health issues. As it was, he needed to get treatment for gout in the wilds of Alaska (the good people in Klawok, pop. 854, took care of him) and got a bad cold on the ship which morphed into bronchitis after we got home and dragged on for weeks. Even in Business Class, I'm afraid that might be too much.
So, we're thinking Scotland. We've been there 3 times but that won't stop us! We'd include the Orkneys- have also been there. This time, freed from the limit of "vacation days", we'll probably spend a few nights on Papa Westray, at the B&B where we miraculously found lunch when we needed it on our day trip there a few years ago. (The island is so sparsely-populated we saw more sheep than people, and it was na´ve of us to assume we could find food. We were lucky.) This time, in addition to Edinburgh and Kirkwall, we might go to Inverness. We don't golf but we love scotch whisky! We'll come home with 4 bottles from Cadenhead's in Edinburgh- they pour it straight from a cask from major distillers into the bottle- no dilution, no filtering, no mixing even with casks from the same malting. You can't get it in the US. It's over the limit you can bring in but we always declare it and have never had to pay duty.
I hope we can make it work with frequent flyer miles. DH will bring hand sanitizers and, if he can get agreement from his docs, some "just-in-case" meds. I'll also make sure his Medicare Supplement covers over there or get trip insurance.