As I now read the revolver forum daily, I feel the urge to inquire about Smith semi-autos. Very dangerous I'm sure, as I now have the lifetime revolver addiction after my first year of shooting/collecting. I like the 45s and from my limited reading on autos, it appears that the 3rd Gens like the 4506 are very popular, proven, all around good guns. I'm thinking the 4506, if I were to come across one or buy one, would be a good decision. Could someone please give me a list of models for all 3rd Gens in 45acp? Is there a model difference for different barrel lengths? Thank you for any information. I'm not looking to buy one right now but am trying to create my list of future purchases. 
