Be sure to check out Panshanger - it's a lovely strip.
I learnt to fly at Denham with Cabair, and am now based at Panshanger, but have had experiences at all of the airfields you mention and it's easily my favourite.
Once you accept that this is a fun airfield run on a passion for flying rather than making money, you can easily forgive the best-effort RT and sporadic reception staffing! Sure, the owner can be a bit bananas with his sense of humour, but he means well and you can't knock his skills as a CFI! The restaurant, facilities, maintenance and atmosphere are all superb.
Drop me a PM if you have any specific questions, or indeed want to be shown around on Friday...