Ian, as I was thinking about your initial post on this topic, I decided to challenge myself on going through all the research again for a new aircraft. This is what I came up with:
High Wing - Cessna Sky Catcher, Dallach Evolution, Bilsam Sky Cruiser.
Low Wing - Toxo, Vans RV 12 (Vans RV 9A with 750kg), Shark, New Horizons
Different - ION
There are a few assumptions in my choices here. In particular cost, ease of construction (if I went that way again) and reliability.
I would be looking for a new generation engine that ran on JetA.
Them's my thoughts, FWIW.