Also applies to diagnosed peeps. I was very close to buying Sony headphones to replace a shit pair of skull candy headphones at 298 quid when I've only 306 quid in my bank account.
can't help you with the money or self control bit buttt
if you're looking for quality headphones I'd like to take a minute of your life to preach my favourite Audiotechnica m50x headphones, they come in both wired and bluetooth versions, less than half the price you said Sonys cost, and they're the best sounding headphones I've ever tried
M50x are great cans for noise canceling. If you want open backs you can try Grado SR80x. They actually have BETTER audio quality than M50x, IME. The spatial sound is crazy. That said, they do not cancel room noise at all so if that's a deal breaker then go with the ATs.
it does not exist, at least not in the exact model I have. No pair of headphones can have everything. Passive noise cancelling is rather decent though! The headphones cup your ears well, and if you need some extra quiet I personally slip ear plugs underneath and then make the music louder. I myself am not too big on ANC, it makes my head hurt after a while