IMO, and from what I have seen in classes, a quality striker-fired gun is going to be generally more reliable and impervious to conditions (e.g. still works reliably when dirty or under-lubricated) than a 2011, especially if you are looking for a budget 2011.
Note the Sig 320 issues have a lot of firearms industry people (including trainers) taking a closer look at the fully-tensioned striker guns (like the 320) vs Glocks where the striker is not fully tensioned, meaning with a Glock the trigger press is required to put pull spring tension on the striker. The fully tensioned strikers have "nicer triggers" because you aren't compressing the striker spring when pressing the trigger, but there are downsides (such as a mechanical failure of the sear possibly causing the gun to fire).
If you have large hands, double stack Glock like the G19 is where I'd start... if you have medium to small hands (be honest with yourself, a gun that is too big for your hands will be a constant frustrating struggle) then I'd recommend a G48.
I have medium size hands and a G48 (which is my EDC) fits my hands great and is very concealable. I'd also have no issues with a P365 variant, they seem to work very reliably and thankfully have a different internal design than the 320 grenades.
KR Training staff instructor - www.krtraining.com
Corps of Cadets Marksmanship Unit Assistant Coach - cocmu.com