Thanks to everyone for your input, some interesting bits and bobs : but to be honest, I'm beginning to think (leaving aside all the "style" arguments, which are personal taste issues) that my 210 is probably as good in most areas as most of the competition, and better in some.
The DA50 is interesting : I'd not heard of that, and it will be interesting to see how (if?) that turns out. The DA42 has always been interesting, but I have certain reservations about that which put me off last time I went buying, and added to the undoubted depreciation they're still going through ... well, we'll see in 18 months time.
FF