Are you going to shoot it or just carry it? In a decent holster/belt, the Sig will be your better shooter, while concealing quite well. If you can find a CS9, that will fit your criteria (I really regret selling mine). If you want reliability, but are not going to shoot much, the LC9/Kel Tec etc... would be lighter.
The 239 is my EDC and has several thousand rounds through it in last 9 months.