Martin, as it happens, although Haydn isn't really my thing, I was given the whole Dorati set as mp3s by a friend. I'm away from home at present but I think that this month's Gramophone or IRR carried a very favourable review of the Nimbus mp3 set which clearly preferred the performances and interpretations over Dorati's. I can't remember the grounds for this preference unfortunately, nor what was said about sound quality.