Thanks for the advice chaps, although I'm afraid that I'm now going to upset you all by ignoring it to a certain extent. There are two reasons for this
(1) Logistic changes at home mean that I could do with a second inkjet printer.
(2) Whilst high quality is a good thing, flexibility and speed are much more important to me personally - and I don't really want to pay £30/100 to scan in a collection of several thousand (mostly aircraft) slides in case I might need one or two of them in a hurry.
So, after due deliberation, I've ordered myself an
Epson RX500 which is a combined printer/scanner with an included transparency scanner. Reviews elsewhere seem very flattering about everything except for a tendency to paper jam (which I can live with).
I don't suppose that the quality will be up there with the latest dedicated Nikon scanner, but people speak highly of it, the price is good, and I needed a second printer anyhow.
Once I've had a go with it, I'll let you chaps know how good it really is!
G
(And if the quality isn't magazine saleable - I can always use a mail-order service for the occasions when I need that - but mostly what I need is to generate illustrations and powerpoint slides.)