Just as a counter point, I thought it was the exact opposite when I owned Utopias (OG in my case). When I got a 300b amp, the Senns were the main beneficiary, becoming natural, spacious and surprisingly warm-ish. There was a big change from a Pendant to the HA-300 for the Senns, but not for the Focals. The Utopias, to my ears, had a very slight plasticky timbre and never lost their treble…spiky-ness? like the Senns did. The 2022 is probably quite a bit better in this regard though. And of course, we all hear differently and have different preferences, etc., etc.
So I say, skip the Utopias and get better gear for the Senns! This is the HD800S thread after all. And then get Utopias, cause they are great.
Also, shout out to the HD280 pro in your sig, my first headphones as well. I rocked those ugly headphones all over campus, before big headphones were a thing, and looked like a happy idiot doing it!