Perhaps some audiophiles can recall the Marantz 6002 cd player. I have this with Harmon Kardon 970 amp and Monitor Bronze BR2 speakers. If I wished to revamp keeping to within somewhere around £300 per unit, which i or 2 items would you change, please? Perhaps ,nothing? Play principally classical stuff and often use headphones. The amp was not a common one but recommended at Sevenoaks. The Marantz obviously had two or three changes, but are they hugely significant?