How to manage iPod and keep it in sync

[Simon Brandmair <sbrandmair@gmx.net>]

Hi group,

I am looking for a program to properly manage my iPod. I am aware of some 
programs to add and delete songs (like amarok), but I am looking for a 
program which
 * displays missing files on iPod, which are in local music collection
 * syncs by prompting to add them to iPod or delete them on local 
collection
  * displays missing file on local collection, which are on iPod
  * syncs by prompting to add them to local collection or delete them on 
iPod

I would really appreciate some pointers.
Cheers,
Simon