I know where you're going to get yours so here:
https://www.worten.pt/inicio/imagem-e-so...711-k.html
Those are the ones I'm currently using. They do a decent job blocking outside noise, while still letting you hear someone talking to you. Laptop fan and disk spin-up noises are completely blocked. Cars passing by are still audible. Sound quality is good enough for my ears. Like GC says, if you're listening to mp3's, a lot of the quality is already cropped out so your sound quality becomes the same regardless of which speakers you use... as long as you don't use some really crappy ones which further degrade the audio.
https://www.worten.pt/inicio/imagem-e-so...711-k.html
Those are the ones I'm currently using. They do a decent job blocking outside noise, while still letting you hear someone talking to you. Laptop fan and disk spin-up noises are completely blocked. Cars passing by are still audible. Sound quality is good enough for my ears. Like GC says, if you're listening to mp3's, a lot of the quality is already cropped out so your sound quality becomes the same regardless of which speakers you use... as long as you don't use some really crappy ones which further degrade the audio.