We're all so particular about our personal carry guns, and darn well we should be! I'm particular about my auto insurance too. I'm as particular as I can afford to be about anything that I might really need in a hurry one day!
I enjoy remarking sometimes on how it's not a one size fits all situation, but imagine this nightmare scenario: your carry gun suddenly dissappears and there are no more to be had!
Sure it sounds silly, but if you carry something that's not a classic pattern like a 1911, it could possibly happen. Plenty of good pistols have gone by the wayside. For instance my Rossi 971 is a nice enough gun, but if it ever breaks, that's all she wrote! There's no parts or the like to be had.
So what's your second string? For me it's the GP100 I always rant and rave about. I think it could become my number one if not for the fact I don't like to carry it any other way than strong side OWB and strong side OWB isn't an option for me much of the time. I've got to have an IWB option for my primary, it's just a rule of mine.
When my XD holsters were being made, I also relied on the CZ 75B. I have to admit it's not my first choice either, but there is absolutely nothing wrong with it. I remember some time ago I was looking for a gun that was a "spare", a serviceable but not very expensive handgun in the 9mm cartridge that I could lose if I had to and not cry about, and yet was a quality gun I could trust my life to. I believe I've found it.