Alex - the MX 25's have Dynalite SL shafts. MX 23 have DG Lite. Popped into local range and picked up an ex-demo MX300 with DG XP so I can try it out to see if lighter shaft does make that much difference. That is a nice looking club and might be where my future lies in the longer term. Should be some good deals around as it's now been superceded by the JPX800 pro.
Bladeplayer - Sadly I'm not gong to Donegal (golf holiday in the Emerald Isle still a life time ambition though) but that's a kind offer.
As things stand, heart and eyes say MP32, head says MX 23 or 25, Mrs MN says "why do you need more golf clubs?" (must watch out for her reading over my shoulder)
Need to ponder and see if I can try some out.
Once again thanks to all of you for your advice.