I do not care for the sound quality of compress mp3 or aac music file , so I want a pair of headphone that would allow I to hear all the nuance of my Apple Lossless rip music collection on my iPod Classic . so after read the headphone review on the Goodcans and Amazon web site , I decide to buy both the Grado SR80i 's and the Koss PortaPros . my thinking be this , I would listen to both headphone , choose the best sound pair and return the other . both headphone be highly rate and both be fairly inexpensive , but since I would be use the headphone at work , I want to make sure the sound leakage from the very open style of the Grados would not be a problem . after test both headphone , I determine the sound leakage of the Grados be a problem , but the sound quality be so good , I decide to keep the Grado SR80i 's for home use and use the Koss PortaPros at work . since this review be suppose to be about the Grado SR80i 's , let I just add these final comment . the Grado SR80i 's be the first pair of open style headphone I have never own , and I can say without any doubt they be the best sound headphone I have ever listen to . I be hear detail in my music that I never new be there , which be simply amazing for a pair of headphone that sell for under $ 100 . you will not be disappoint in this purchase .