The top contenders right now are PPK or PPK/S, LCP, and 3AT.
Alright, I have the S&W/Walther PPK/S...and it is the very accurate. (See my .380 day posting from Oct. Nov. last year.)
But it's heavy for a "Bond,,,,,James Bond" pistol...I have a great Don Hume IWB holster that fits it like a glove, but in shorts can create the "droop" unless I go another hole on the belt.
Jeans aren't a problem just shorts, this may not be an issue for you I'm just sharing my personal exp. The LCP and P3AT are so close that Ruger was almost sued by KT, so Ruger put in a slide stop, and a slightly different mag release. The KT doesn't have a slide stop.
The PPK/S also holds the best resale value, as good used ones are almost always over $400 and NIB, are $5 and change or more.
But for an everyday lightweight wallet, keys, cellphone, pocketknife, "pistola", out the door,.....the KT, or LCP would be the ticket. I use a DeSantis Nemesis pocket holster, and its comparable to having a pack of Marlboro's or deck of cards in your pocket.