Chilbolton and Popham are the two obvious places to look at.
Popham is bigger and better resourced, but more expensive.
Chibolton is small, cheap and friendly - and a bit more microlight intensive. If Chilbolton can ever be called intensive !
Both would I'm absolutely sure would be happy to have a new resident syndicate. Both have instructors and BMAA/LAA inspectors and check pilots either based there or local and "known friendly". They're both friendly clubs, and only a few miles apart.
Both of them it's worth going and saying hello in person - neither has a good web presence.
Of your list, all are good aeroplanes, all have strengths and weaknesses. I'd suggest starting at the X'Air as a baseline - it's cheap, there are lots available, storable outdoors, and there are lots of engine options. Having a baseline, means that you can then consider "differences" which makes understanding your options easier.
P