need noise isolation earphone budget 200 what's the best one? mostly for music

what difference would in earbud or iem produce in terms of sound quality, or is it just a comfort issue?

uh, which brands specifically do u mean when u say PL50 or SP1? what do u think about the shure se102 btw? is it among the best for its price range? are there other more affordable models with similar performance? i wouldn't mind paying a bit extra if it is as good as they claim it is, but it'd be good to keep within budget loh.