You are considering a wide variety of 22 handguns that are quite different in many ways. All you left out was a revolver.
Since the only ones not discussed so far are the GSG & Sig Sauer 1911 22LRs, let me toss in my two cents. (I have the Sig) The guns are identical except for the finish on the and Sig offers a better warranty.
If you like a 1911, you're going to like a GSG/Sig. It is just like shooting one of the big boys until you pull the trigger. The Sig is fairly accurate out the box, but can't say it's as accurate as a Buckmark or Mark III. If you like modifying a gun you can get quality performance parts from GSGPro.com and ZR tactical Solutions.