I've got both the Webley and the Colt SAA (antique finish - with the horribly white writing either toned down or obliterated). I think the Webley is more consistent then the Colt in accuracy.

Not sure whether I could really justify the pellet Webley, maybe I would be better buying a target pistol.

However I reckon the KWC Luger is even better than the others, possibly because the action actual inserts the BB into the barrel.