I guess I'm the odd guy here. I typically conceal fullsize pistols. I'm not the biggest guy around, and I usually walk around with a 1911 Government model or HK45. If I'm flying somewhere, my travel pistol is a 1911 Commander or HK USP in .40 S&W. Right now, I'm seriously contemplating the HK45 compact, but honestly, it's not that much smaller than the fullsize. I just want it :cool:
I do believe that the best concealed carry handgun is, in general terms, the largest pistol in caliber and physical size that you can shoot well and fast, and most importantly that you will wear religiously. The gun has to fit your hand well, and you have to practice with whatever holster system you choose- a lot.
I agree with your basic idea here; however, as many have mentioned the type of clothing ones forced to wear, activities one is engaged in, location and in the case LEO's, what the departments regulations require. One of the reasons I picked the Glock 27 & Glock 26 is that most LE agencies (To include my old one.) issue the Glock 22. (Other agencies use Glock 9MMs.) I like the idea of a smaller compact weapon easier to conceal that one can use the full sized issue mags (G-22/23 mags in G-27). A variety of holsters to fit the needs of what one is forcred to wear due to social events and/or weather is important as well.