If we were to get an arvor, that would have been our choice aswell. The nanni engines seem to get good reports but not so much the vw's, turbo problems always seem to pop up with them.
quick note on that post, the vw marine engine in the arvor 215, 250 etc are all the same, brilliant solid engines. Yes they have slight problems with their turbos only down to lack of use as they use a variable vane geometry turbo. Meaning they seize without regular use and maintenance. Very easy fix even if your not a marine engineer lol, however I know of a couple of people that have had theirs replaced or on warranty reclaim.
Anyhoo... I can comment on 215 as my father has one, brilliant little boat that ticks all boxes. Easy to use, move and fish on with the option to trawl aswell. Also with live bait well that can be used as a sink or whatever you want lol. Plenty room and space to keep gear. Cleans up a real treat and easy on the eye.
The only problem I know with these boats are the turbos and the wiper motor seizing. Both are easy fixes. (experienced both!!!!)
Ive been aboard the Q, nice little boat but just doesnt seem to have the fishing space of the arvor.
Best thing really is to research and to go on/use both boats. Lads in mariners etc are nice chaps, and Im sure a few words with them would give you great advice.
Speak to a lad called Dan at Essex Boat Yards aswell, he's always been really helpfull to us.
Good luck with boat hunting either way lol