This little Sig fan boy is now officially one of the cool kids who own and shoot 10mm pistols. Just kidding. Wait, no I'm not. Seriously though, the Sig Sauer P220 Legion in 10mm is pretty nice and 10mm is a blast (pun intended).
There is no perfect everyday carry configuration for every situation. It's very likely that more than a one configuration will be needed to cover different forms of attire. It will also most likely evolve over time as preferences and proficiency changes.