Apart from the Loire (and a big thumbs-up from me for Savennieres), South Africa is looking like the new go-to place for classy Chenin Blanc these days. Perhaps the Chenin-dominated blends are best of all. The Society usually lists a few of these ones at the top end as well as the ones mentioned already, though the best seem to vanish from the list very quickly, so grab them when you see them! A bit of a turnaround from back in the KWV monopoly days, when it was all made into characterless white under its nom-de-guerre of Steen.
Chenin is a bit unusual as it seems to do well in a range of climates.
Three or four years ago I visited Coriole in the McLaren Vale. They do a basic but well-made Chenin. Talking to them about ageing, I asked how their wine matured, and they very kindly pulled a ten-year old bottle from their museum stock. It was wonderful!
But anyway, just to say that Chenins age really well, taking on characteristics that only emerge with bottle age. Savennieres particularly - its mature taste reminds me for some reason of antique wardrobes, though I can’t imagine that’s of much use to anyone else.
One other thing - it’s often said that to really appreciate lesser wines, the best thing to do is to splash out on a really good example, to see the sort of thing they are aiming at. Not much help with Burgundy or Claret (!), but it works well with dry Chenins. The very best are rarely much over £30. Sweeter ones can be a lot more though.
(I started typing this but got interrupted so many times that others have covered quite a bit of it already - too bad!)