I currently have an iPod Shuffle 1st generation. With iTunes it automatically converts all higher bit rate songs to 128 kbps AAC when I sync it. However, I'd like to be able to select 256 kbps AAC if I could for better sound quality. Is this possible with the latest iPod Shuffles (4th generation)? Or does iTunes limit the 4th generation Shuffles to 128 kbps AAC on-the-fly conversions as well? I know with my iPhone and iPad I can select 256 kbps AAC as an option, but I am very attached to the Shuffle form-factor for its simplicity, and it is my portable playback device of choice these days. Also, I love the sound quality of my 1st generation Shuffle. It sounds fantastic. Does the 4th generation Shuffle come close to the sound quality of the 1st generation Shuffle?