All this salivating over the NEXT polyester-n-zinc POS from Umarex seems a bit odd on a forum dedicated to things Walther.
If you want a SERIOUS .22 autoloader, you don't have to wait for the wheel to be reinvented. There already exists a superb Walther pistol of impeccable craftsmanship and undoubted reliability. Save up some money --including some that would probably be wasted on lesser guns-- and find a nice used Walther or Manurhin PPK, PPK/s or PP in .22.
Second choice: a Colt Woodsman or an Astra Constable.
Or, if you can be content with a wheelgun, any of the S&W K-frame revolvers in .22 is a marvelous choice. My first handgun, some 45 years ago, was a S&W Combat Masterpiece in .22 (it's a 4" K-22) I still have that gun. It's had countless bricks of .22 ammo put through it over the years, and the sideplate's never been off. If anything, it's more delightful than when it was new.
M