Only the sheeple.
I prefer open carrying over conceal carrying because it is so much more comfortable and visually a deterrent to most criminals that might think about doing something.
Please kindly stay out of the thread if you're an anti-gun fanatic.
To the OP:
.40 is a great round, lots of people I know use it rather than 9mm or .45 for various reasons. Personally I don't like the recoil that a sub compact .40 provides, it feels....sharper than a sub compact .45 to me. If you're going to conceal you'll definitely want a sub compact and then you can opt to have a short grip or run a short grip with pinky extension mags. I personally can't handle any sub compact without some sort of grip extension or pinky extension.
You have lots of choices in .40, as there is the glock, Springfield XD, 1911 conversions, and plenty of other choices. Try shooting a few of them to see what you like best. I can't deal with the grip angle on a glock so I opted to get an XD - But I don't carry it day to day, its my home defense pistol.
Also - While a multi purpose gun is good in theory, I opted to go with one for HD, and another for carrying. My HD pistol was a 4" XD 45, while I CC a kimber ultra carry II. HD a low recoil weapon with high capacity, carry a small concealable low cap gun for weight.