Pros: Bulid Quality, UI, Powered by Itunes
Cons: average SQ (maybe less than average), do not support FLAC, APE, very bad EQ
If you can't stand some DAP without a decent UI, Ipod Classic will the best choice for you.
Powered by Itunes, Classic might be an unmatched DAP and also the most popular one.
However, some fatal cons make it (without amps) stay out of Hifi area
For a single DAP 5 stars,
For a hifi DAP only 3 stars
So average scores will be 4