looking for headphones with the best sound quality
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hello! so, i'm not really too into headphones, therefore i lack a lot of knowledge on them. but i currently have AirPods 2nd gen (probably the oldest AirPods generation), and I like earbuds but I want to upgrade to headphones.
All I really want is the best sound quality I can get. I don't really want an amp or any other equipment, I really just want it to connect to my phone, be comfortable, and have really good sound quality (better than AirPods).
I've considered Sony XM4/5 and AirPods Max, but neither really have great reviews based on sound quality. So, I don't really want headphones unless they're going to have better sound quality than my AirPods rn. I also don't care if they're open back, close back, whatever you think will work. And my budget is hopefully under like 350-400
EDIT: Thanks for all of the recommendations! There's definitely some confusion so I'll clarify further.
I am mainly looking for wireless headphones as I mainly use them while in class, traveling, or doing stuff around the house.
I mostly listen to pop/hyperpop and r&b, but I would also like headphones that could be good for watching films as I do that a lot.
I really just want an all-in-one with no amps or anything really needed to connect/make the headphones sound good, and can just take them with me wherever (like AirPods).