If you have 1500 CD's that you want stored with lossless compression(Flac)or Uncompressed (WAV), Request is the only way to go. That is the main reason why these units are more expensive. They can't be beat with the everyday players for compressed sound quality. With this many discs you will have to go with at least a Tera 480 for Flac quality, retails at $15000.00, or at least a Tera 900 for Wav quality, retails at $20,000.00. Hope this helps.