After some research, I came across a manufacturer who produces the Eames Lounge Chair exactly as it was made in 1956.
It's like with fake brand watches. Some are really well made, but none are stylish.
Buy an original. You do invest more capital, but you also get more value. In the end, it's not more expensive; the money is not lost, just tied up. Möbel Patt has an advertisement on a bus in Bergisch-Gladbach with an Eames Lounge Chair plus ottoman and the headline: "Sometimes it's better to sit on your money." I find it funny.
I think it's important to use the classics sparingly. A whole place furnished only with USM and Eames just shows a fat wallet – not good taste.
Yes, furnishing is more than a collection of individually high-quality items, and you don't necessarily need premium furniture for good interior design. A bit of "personality" helps. Of course, you can also create a good interior with "only" premium furniture.
On the contrary, USM Haller would only come into my home afterwards; style is a matter of personal taste. But I’m more the System Two type myself.
Regarding USM Haller – I have seen these quite stylish pieces too often in professional environments to enjoy them at home. I’m more of a System 180 type.