Best all-around full-sized handgun for under ~2k? I'm talking about a "I'm only going to buy one handgun in my entire life so it needs to be phenomenal" kind of gun.

I'd like to invest in a full-sized handgun that will be used primarily for home defense but that would also function well in a shtf scenario (don't judge me). The most important qualities for me are reliability and build quality. Obviously accuracy, capacity, ergonomics, etc. are important as well. I'd also like it to be able to take a suppressor and function well with it. Could be .45 ACP, 9mm, 10mm, or whatever.

It looks like the HK MK23 and Sig P226 Legion are the ones that come up the most often when I research.