So I don't know what 128 kbps means. Someone told me that for better quality, I need at least 256 kbps. I use my ipod with my stereo system and am planning on purchasing a pair of Shure e4c's for my nano. I am wondering what kbps rate will make the biggest difference with my earphones (256, 320, etc) Also, I do not know the best way to change it. I know if in iTunes you go under preferences and choose custom under the advanced importing option you have lots of choices. But I dont know what sample rate I should choose, the channel, or if I should enable Variable Bit Rate Encoding. Thanks.