My "congradulations" purchase when I got my CHL was a Smith & Wesson 908 9mm. It has seen a great many rounds at the range, and many, many miles in the holster. I have purchased half a dozen or so pistols and revolvers since then (in search of the "perfect" carry gun), however I keep coming back to the 908 (even though I'm a revolver guy at heart (crazy, huh??)). Think of the 908 as the platform for the 3913, it's somewhat the same pistol but without the extra's... like ambi-decocker, less TLC on finish, checkering, etc. It's a fine bargain that has kept me and mine safe while out and about. I can't give Smith's auto's any higher praise than to say they are what I carry. You cannot go wrong.
As far as the 3913LS, don't have one yet. It is on my wifes list of wants, so I see one coming in the next 6 months or so.
JLaw