In addition to this choice of calibers I have decided that I wanted to keep the rounds most popular with gov/le/etc. and if the SHTF and you need a common round found in Gov. gun.
I've been doing this for the most part. Most of the PD in the area I live carry Glock 22's, as well as the state troopers. If I'm not mistaken, a lot of federal agencies also use them. After all, the .40S&W round was developed for the FBI, and fairly recently too. But this is also the reason I went with a .223/5.56 AR-15 instead of a 7.62/.308, and the 12-gauge instead of a .410/10-GA, etc. All about the availability of ammo, especially when everything gets turned upside down! Very solid advice.
Second I like options, lots and lots of choices and lots and lots of suppliers for an infinite combination of choices. What I mean is I like making the gun my own and I love trigger jobs to barrel swaps to grips, lights, sights, hi capacity mags, internal upgrades, you name it I'll try it at least once.
So with both those things in mind, ( and nothing personal about any of these weapons) but, even though FN makes a awesome gun they don't offer much in aftermarket. I owned the fn 45 tactical loved it. Had the red dot sight the works, only one place to buy a holster for it. Mags for FN are extremely high! So the same can be said for HK they have more options for aftermarket but again very expensive. See where I'm going? I think the collection you currently have probably comes close to that mentality anyway. Why not expand on different models within the calibers of guns you have? Parts may or may not interchange you can have fun with customization of them ie your Glocks.
Last but not least one gun you left off your list is a S&W Govenor. Now I'm not a revolver man but oh my is this thing awesome and boy does it have a big hole for a barrel. Never mind the Winchester PDX1 410 shotshells it shoots.
I am also a fan of aftermarket parts. Though the Glock I carry has now been returned to it's stock configuration, it at one point had a lot of stuff on it. My third-gen Glock 22 has quite a few modifications; some that serve a purpose, and some for looks. While it is nice, it's not necessary for me to be able to add stuff to my guns as long as they work well out of the box (though it is nice). That being said, the aftermarket parts-world is one of the reasons I am leaning towards a 1911 a lot more now. My list has been shortened to the PPQ, or a 1911, probably the Kimber TLE II. Another Glock would be sweet, but I do kind of want to expand. That will wait until tax season
Ruled out H&K because they don't seem worth it for the price, and FN because I could buy a pistol of similar quality for half the price those cost. I'd rather do the latter and spend the difference on ammo.
I have had the chance to shoot the Governor. The fact that it can chamber three different rounds is awesome, and downright sexy haha. Unfortunately, I think it would serve me better as a home defense gun or a "car gun" (more like a get-to-the-mossberg-in-the-trunk-gun). Not sure I would ever carry a wheelgun, though people do swear by them and have for quite a long time.
Thank for for the suggestions and advice! I really love hearing from people.