These speakers would work just fine with the Amp, although you would only have a left front and right front channel without a dedicated center channel speaker.

Have you considered a Sonos Arc sound bar and Sub?

I have.

You replied to another post of mine in which I ask what I should do with my Beam. You said get the Sub first, then replace it with an Arc down the road.

However, Arc+Sub is very expensive here in Europe. And I found an used Amp for 450€ (the new one costs 700€ here). Thus the question.

These speakers cost 450€. So the total would be 900€.

Arc+Sub will cost 1700€. That’s a big difference.