docking speakers for pc and ipod/sony nwx-1000

[jtfab75]

i'm looking to get a ipod or sony nwx-1000 this weekend but i also want docking speakers.the speakers must have a 'line in' for my pc to use.
this is to save save and electric.

i know there are loads of docking speakers for the ipod but not the sony, do the ipod docking speakers have the line in ?

what should i choose ?
thanks