I also subscribe to the practice of buying quality over quantity resulting in owning less guns but the ones I do own are all fine quality guns by the original company's. While there are some descent knock-offs out there like Tisas, Taurus, and many AR's, I stick to the originals. While knock-offs might be OK for the short term, they have yet to be proven for the long haul. AND..... at the end of the day when they are sold, you will do way better selling a quality Colt 1911 than a Tisas - IMHO of course.
It's not 1980 anymore.
And I'm glad it isn't. Pulled a brand new Colt Gold Cup out of the box with a bullet stuck in the barrel in the mid-80s. Never had that happen with any of my Tisas...
I have 4 Colt 1911s and 4 Tisas 1911s. The fit/finish of the Tisas are the equal of current Colts, and superior to those of the 80s/90s when Colt's old equipment was wearing out. The Tisas all have forged frames/slides and no MIM internal parts. Of course the Colts are more valuable, but then the cost of entry is a lot higher.
I also have 2 Colt ARs, and 2 PSA ARs. The PSAs run just as well, are just as accurate, and cost half what the Colts cost. All of them have 1000s of rounds downrange, and required nothing but normal AR maintenance.
With things like ARs and 1911s, "knock off" is pretty meaningless at this point. Is a S&W AR or 1911 a "knock off"? How 'bout Sig, or Springfield Armory?
There are still some low quality guns out there, but "knock off" is an overgeneralization that doesn't recognize the reality of the current firearms market.