If you’re looking for a “pleasant” listening experience as opposed to a “Critical/studio” listening experience, then yes, I’d absolutely recommend the 598Cs/569 over the M50X.
The M50’s have an aggressive upper midrange that will cause fatigue during extended sessions.
The DT770’s have similarly sharp treble…but combine that with an accuracy and a punchy bass response that I really personally love.
But if you don’t like the sound of aggressive/sharp treble, the Sennheiser models are the best choice. These closed models do have a bit more of an edge than some of their open pairs, but it’s still an easier listen than the others you’ve mentioned.
Your amp is more than enough to drive any of these headphones! You could drive 250 ohm headphones with it, no sweat!