Thanks for this advice, all very useful.
Yes that is a dining table! It telescopes back down to become part of the deck; i thought that was kind of nifty!
My aim was to keep it simple; bigger boat means bigger engine means higher fuel consumption means higher cost all round.
Maybe I can start with the 4.7m, and if it turns out too small p/ex it for a 6m next year.
There are plenty of good quality slips round here, so it is reassuring that launching and recovering should be straightforward. I have a big hangar in which to store the boat so no problems there, and I have an Audi S4 to pull it, (4wd, plenty of poke). Would the S4 pull a 6/6.5m RIB OK?
Also, as I'm buying this in France, I have to do a test to get a coastal licence before I can even go out in it. I believe in the UK no such restriction exists...?