Hi   I`ve just purchased mine but now.... is there a big difference with this headphones if I use Flac or mp3? Because I have all my music in mp3 format. =(

Hi!   I´ve just purchased the UM3X  but now I have a big question: which mp3 will suit better? I head that sansa have a good quality sound, but did Ill notice it? because I have all my music in mp3 and not in flac!!!   And I think I´ve wasted my money because I have my music in mp3 and...