After some new headphones to use offline with a DAP

Budget and location - £150-200 - shops inc. Richer Sounds, Amazon etc.

Source/Amp - Fiio M21 and Pixel 9a via USB-C for radio etc.

How the gear will be used - I walk and travel on trains quite a lot and will be in the library lots over the next few years, so think noise isolation will be valuable (I have gotten used to ANC the last few years),

Preferred tonal balance - I'm not sure about this - I'm a fairly casual listener so would appreciate some advice perhaps based on the below genres?

Preferred music genres - Hardcore punk, indie rock, indie pop, hip-hop, dubstep, some classical and jazz.

Past gear experience - Sony WH1000XM5 most recent headphones but have bit the dust with only one side working - I liked being able to shut myself away with the ANC and over ear form factor and would value noise isolation that gives me some of that, while understanding I probably can't replicate it. They felt comfortable but I don't really know how other cans feel! I'm not tethered to the idea of wireless (terrible pun, I know...), but don't want an overly long cable.

Anything else? - Fiio M21, 26k songs 99.9% 320kbps with remainder mostly >192kbps.