Look out for 1911 look alike .22's that have come out lately, many are made of zinc based pot metal.
You can't go wrong with a Ruger mkIII, if you are willing to remove the mag safety and some other lawyer garbage. Accurate? In spades! Rugged? There too, and after the pot metal guns have turned into piles of zinc pest dust the Ruger will still be good.
If you do want a 1911 look alike RIA is making some 22's out of 4140 steel throughout. That alone means they are infinitely better than the zinc guns that are being foisted on ignorant consumers now days.
I have CNC produced 416 stainless triggers to replace the plastic triggers on Colt Mustangs, Mustang Plus II's, MK IV Government .380's and Sig P-238's. Video on installation in Sig;http://www.youtube.com/watch?v=Jh2v_-87DRM
Also I made up a hundred Llama .32 and .380 recoil spring buttons, checkered nicely and blued.