I have no experience of the outfits that you can fly with I'm afraid.
I converted from gliders to power with the CFG. I mostly flew G-AHIZ and can certainly recommend them ... (assuming they haven't changed too much in the intervening 18 years!
). Whilst the Tigermoth isn't everyones cup of tea, it does teach you to fly properly! They are not the most pleasant handling aircraft, but they are not difficult (except to fly "well"). Taxiing downhill with a following wind is .... well, "taxing" to say the least. They have no brakes unless retro fitted, so require weaving across a down slope. Good character building stuff though, that will improve the way you treat any aircraft thereafter
SS