Hi, I am thinking of getting a dedicated CD player but was wondering what the collective thought of this was forum was as to whether it's worth it. I have a long serving (and much loved) DVD player- a Sony 725. I've been using it to play CDs and it has been OK. I wondered whether it would be worth buying the Nad 521i to improve the sound. I have: Marantz 4200 AV amp B&W 601S3 speakers Any thoughts gratefully received.