u/noteethnobrows

Heya, I've been doing extensive research on headphones and I have some potential headphones that seem interesting, most interesting currently being the hifiman XV. I have watched a few reviews and what I'm gathering is that the fit can be a little bit not great for bigger heads, mine is 59cm around, and my ears are like really out there like no matter what the headphone will be my ears will be kissing the insides of the earcup.
I don't have a wide range of experience, I had the beyerdynamic dt 770 pro 80ohm, and after that I switched to a sennheiser hd 660s2 and even though that was some time ago I remember greatly preferring the sound of the sennheiser, though it wasn't perfect (but very good). I've heard a lot about hifiman headphones here and there among other reviews and videos I've watched and it sounds like they are very detailed, and when I saw that the XV was described as a "darker" sound I got very curious, since that's how people also described the hd660s2, which I enjoyed.

As a side note I did not have an issue with the sennheisers clamp force which some people have said is stronger than they prefer. I also wear glasses.

Bit of a ramble, but my question would be that does anyone know alternatives that I should check out? I am sensitive to sharp upper frequencies, my budget is around that 500€ mark and I'm located in the EU so headphones that are available at european retailers and online stores would be preferable. Also, the flair says open back but I am open to closed back suggestions as well. Many thanks!