From the features you like,I think you would do well to check out a Kahr K40 or P9. The 40 can flip pretty good in a gun that small, so I recommended the steel framed K40 instead of the P40 (polymer). The P9 is a polymer framed 9mm that is light. Both are flatter than anything else on your current list.

Kahr also now has a new 45 ACP, and I'm sure the next few years will bring out a 45 GAP. That one should be about perfect, but for now my personal choice would be the K40.

How concealable a larger gun is depends on your build and how you intend to carry it. Leaner guys like myself, need to watch gun size pretty closely, but larger framed folks can hide a Desert Eagle.

One more hint. Don't skimp on a holster. Get a good one and wear a belt that matches the size of the slot in the holster so nothing can shift.

I'd also spring for night sights. If you ever need to draw that thing, you'll need every advantage you can get, and night sights can make a big difference. If possible, get the dot-over-bar, or dot-over-dotconfiguration. They are the easiest to line up quickly.