I've been using Sennheiser CX-300 in-ear phones with my 2nd gen ipod Shuffle and they sound great. Easy to drive so they give good battery life from my ipod. They block outside noise fairly well but not as well as my over-the-ear Sony noise-cancelling 'phones so I still use the Sony's on the plane.
Most of my music is loaded at 256kbs due to the limited storage space anyway so they easily resolve all the detail available in those files. I've listened to them on lossless files ripped from CD to my Mac mini and with my NAD Monitor Series model 5000 Cd player's headphone jack and they sound even better then. Easily worth the $70 or so I paid for them two years ago.
Most of my music is loaded at 256kbs due to the limited storage space anyway so they easily resolve all the detail available in those files. I've listened to them on lossless files ripped from CD to my Mac mini and with my NAD Monitor Series model 5000 Cd player's headphone jack and they sound even better then. Easily worth the $70 or so I paid for them two years ago.