Out of pure curiosity, can I ask: what does this setup bring you? On top of a 2x27" setup or a 34"/38"/42"/etc ultrawide, for example?

AFAIK the 6700 XT is more than suitable for 1080p@60Hz. AMD themselves market it as a 1440p card. I think the 6600XT could suffice for your needs, it runs Cyberpunk 2077 at 65-70fps on ultra settings at 1080p to give you an idea. For future-proofability you could consider the 6700 XT though, since it has 12GB of VRAM (as opposed to the 8GB of the 6600XT) :)