You should consider the Springfield EMP. Great gun, very accurate, light weight and very easy to carry. You can hide it under just about anything given a good holster. I typically prefer a full size 1911 or commander for carry but the EMP is great when I have to carry smaller/lighter. A good backup for your primary gun is a S&W j frame like the 442 or 642. With a good pocket holster you can carry one anywhere.