Try the Umarex CO2 powered pellet version of the PX4 Beretta.
Very accurate, more so than airsoft, with excellent blowback and recoil.
Very good for action pistol practice.
There's a video review at pyramydair.com.
I've been using one since they first came out, last year.
So far, so good.
Lock the doors, they're coming in the windows.