Yeah Etymotic headphones are awesome,but these headphones cant be fixed :(.Mine had problems with connection.
Best audio quality has WAV second is mp3 320 kbps.
Good heaphones are for DJs(Pioneer,Technics,Denon) so you can get headphones with replaceble cord.
If you want good quality speakers you can check out monitors KRK rokit RP 5 G2 or some monitors from Mackie(expensive)