I bought this unit from Radio Shack for $109 I also bought an Airport Express from Amazon. for $99 You will need a cord from Radio shack that splits an earphone jack into 2 RCA males for $7 First you will have to introduce the Airport Express to your home WIFI net work. Then, you plug the Airport Express into the CD inputs and you can play Itunes or Pandora over WIFI into this unit ( or any unit). Its great.
I hooked up my Zune yesterday. you need a cable with a mini plug (headphone) on one end and dual RCA jacks on the other end. Hook it up to the CD input in back and you are good to go. at 105w per channel the music will sound amzaing. The power is there to keep the distortion at a minimum. The more power the cleaner the sound. For the price you can't go wrong