Best sounding Cowon mp3 player mainly for music.

[tawandapro]

i have decided that since i have an android smart phone with a hi res capacitive 4.3 inch display, im not going to bother with the low res resistive screens of x9 or the x7. instead i have turned to the smaller mp3 player category. I was wondering which would be better in your opinion between the i9, the i10 and the c2 or any other good cowon player with a screen so i can arrange playlists, view pictures. e.t.c Battery life is also plays a major part as well. Im a uni student and i commute an hour to uni an hour back 5 days a week. so whats opinion? Thanks