Interested in an older Model 36 or similar for CCW carry. What model and barrel length is best? Like the 3" but does it offer that much more in performance than a 2" or 2.5"? Is the 3" noticeably harder to conceal or fit IWB? I just picked up a new Walther CCP which works well IWB. But want to have a Smith as well. Have a Kimber ultra CDP and a 19-3 and 18-4 and nothing I have shoots and looks better than the classic Smiths. Thanks for the help.