I am planning to buy a Sonos Soundbridge to enable me to play the music currently held on my computer as well as cd's. I have a very old system consisting of NAD series 3020 amp, Marantz CD 65II CD player and AR speakers. I feel that this system may not do teh music justice and am thinking of purchasing a new amp and speakers. My current thoughts are NAD 326 or Yamaha AS500, KEF Q100 or Q300 speakers. What are the views on this and is there anything aels I should be looking at. These items are the limit of my budget