It's time to change the sound system. I have an opportunity to purchase a SONY CD Player (model 5000) for $175 (new) and a SONY AMP (model 753) $200 (new). The question is what speakers? MB QUART, Boston Acoustic, Jensen, Blaupunkt or Infinity. Do I need to stay with the 4x6 in the rear deck? I enjoy my music, if anyone can help me in suggesting speakers or systems I would appreciate it. (85 635 EURO) THANKS