MP3 Seperate???

Hi,

 After my ipod died for the ....I do no how many times now!

I am looking to get a hard drive based seperate that I can plug into my amp via either Toslink or RCA sockets, the seperate needs to have enough storage for my MP3's and I have about 17,000 at the moment.

This will also free up my laptop so I can work on it and listern to music at the same time.

Any Ideas??