I saw that you were reasonably new to the site and went back and read over your previous posts briefly before I decided on what to say about your question. I see that you already own some pistols and other firearms. And, you were in the military albeit back in the early 90's. So, you already know which end the bullet comes out of and that is a good thing.
Since you are planning on using this for CCW (CHL here in Texas BTW), fun range time, and home protection, there are several things to research. There are many in this forum and others like it that advocate having a compact handgun for CCW and a full size handgun and/or a shotgun for home protection. I certainly would recommend the same thing.
Your first step has already been taken. You've asked for advice here. You will get quite a few very good replies. Another thing to do is look at the various posts from the last few months just to get a feel for different guns. You will find people that stuck on one caliber, one type of gun, indeed, even a single manufacturer. Before you leap, look at it all. The next step in your research is to do what someone already suggested. Go to a couple of local gun stores and just ask to check out a few pistols here and there. See one that interests you. Ask to hold it. Go to gun shows and do the same thing. Does one of those gun stores have a shooting range? If so, they probably have a rental department. Go rent one or two and shoot some rounds down range. Check your accuracy. Check the recoil. Feel how it feels in your hand after it has a full magazine (not a clip).
Caliber, I would get what is comfortable to shoot (not below a 9mm however). I was going to go .40 for myself, but then I noticed how much more expensive it was than 9mm so I decided to go for a 9mm.
For your CCW, I would recommend that you look at the following guns: Springfield XD Sub Compact 9mm, Ruger SR9C (this is what I went with and I like it alot), and Smith&Wesson M&P9C. All of these also come in a .40 caliber as well. They are reasonably priced in the price range that you are looking to spend. There are also even smaller handguns to look at for ultra concealability like the Ruger LC9, Kahr CM9 or CW9, Keltec PF9, Beretta Nano 9, Kimber Solo 9, etc.
For Home Defense, you wouldn't go wrong to get the full size versions of the ones I already mentioned. If you were willing to spend some more, you could also check out the "better" brands like Beretta, Sig Sauer, H&K, and of course the .45 1911 manufacturers like Para Ordnance, Kimber, Rock Island Armory, Springfield Armory, etc.
The two main shotguns I see consistently mentioned for home defense are the Mossberg 500 and the Remington 870. There are, of course, many, many others that are probably just as good or better, but hey, it's a shotgun, it's designed to shoot pellets of various sizes in a spread pattern. How much different are they going to be other than how many rounds does it hold, how long is the barrel, and is it a pump action or semi-auto.
Good luck with your search. May you never have to use it in self-defense and only for fun range stuff.