Thank you everybody for your very helpful comments.
Ceemonster, I think you may be correct in that seeing I am already into a not inexpensive price range then I may try for the best on all fronts. I am wiling to go the extra mile or so for a concertina reeded instrument but finding one is the issue at the moment.I'm in Ireland so the carriage and import duty from the US is sort of restrictive for ordering new for the Morse and was hoping to get one here.However the latest quote for a new standard from the Morse rep here is €2,700 and so am thinking that seeing that this is the price range being discussed it might be a case of going down in price for a second hand Morse if I can find one or going up a few bob to a concertina reeded instrument.I appreciate that I could buy a less playable instrument for more money than a Morse,or similar would cost, but you get my drift.
I think it is just a case of going with the mid range best one I can find, see how I get on and if all is going well, order something like the Kensington from Dana,who's approach seems very worthwhile and to be admired.I will keep an eye out on all the buy and sell avenues and hopefully something will happen and also will check out all those mentioned by Ceemonster