A few points here. I agree that .20 is the ideal compromise calibre in legal limit and that it is a pity that AA don't seem to want to bother with .20 but then again they don't actually want to bother very much with left handers either. Unless they get round to offering a Pro Sport in full left hand I shall continue to make this point on every occasion where it is relevant to the debate.
I am unaware that the Evolution Ultra carbine-formerly known as the Fenman- from Theoben isn't offered in .177. I certainly have owned several Fenmen in .177 with both 10" and 7.5" barrels. You are right that they can be just TOO snappy especially those with the 7.5" barrels as well as being hard to cock. However my experience shows that reducing the power to around 11 ft lb transforms the accuracy and handling whilst making only a tiny reduction in terminal energy and hunting effectiveness. Most I have tested turn out to have over-pressured gasrams and that probably accounts for most of the negative comments around this fine rifle. However in my view the .20 Fenman is a worthy contender for the title of 'best self contained general purpose legal limit' air rifle on the market today. It really is THAT good.