Music
The sound certainly feels more refined compared to the fifth generation, and this too was expected. The player supports MP3, AIFF, WAV and AAC, plus Apple lossless and Audible files. Native WMA files aren't supported, but protected AAC files work – provided they are bought from the iTunes store.
There are, however, loads of presets for different genres of music. The earphones provided are pretty good. FM Radio still eludes the iPod, for reasons I can't quite understand.
Video
Video format support include H.264 video, Low-Complexity version of the H.264 Baseline Profile with AAC-LC audio, M4V, MP4, and MOV file formats. Video conversion can be a pain, and iTunes is yet another pain in the posterior. You still can't drag and drop, and support for third party applications like Winamp have been removed.
Start up time for videos is fast, and you won’t face any trouble even while the videos change (or music, for that matter). It’s the navigation that's a bitch. But you have to realize that once the player is full, the 160GB of content can be quite a handful to manage efficiently.
You guys may feel like that,Even I was also thinking in that way ...but,when My friend bought iPod classic 80GIG for 11.4K from ebay with international warrenty I was a bit amused with the priced and the sound differs a lot from conventional SE or Nokia phones.Guys ,truly speaking iPod ROCKS IT ROCKS A LOT U DONT KNOW GUYS..IT IS A WAY BEYOND ANY MP3 GADGET..U CANT GET SUCH SOUND IN NSERIES AND ALSO IN ANY SE PHONES ABOVE 15K...The only limitation for iPOD is that ear phones doesnt have a noise cancellation feature as SE earphones have(They can be plugged fully in to ears,cancelling the sounds from surroundings) .. 
