iPod Speaker System

Hey there,

I am looking at purchasing a portable ipod speaker system, so i can play my ipod music for my new nano on the go.

Ive looked at the following, can i possibly have your opinons???

[SIZE=4]Altec Lansing inMotion iM7 iPod speakers[/SIZE]

iLuv i552BLK

Harmon Kardon Go + Play