I have owned an LCR .38 Spcl, and an LCR .357 Mag.
I wouldn't buy a .22, not worth it at all. The LCR .357 is rated to shoot .38Spcl, and the heavier weight vs the .38 version helps the recoil a bit. If I was to buy another, I'd only get a .357 (Even if I never shot it with .357 ammo.)
-Rob