Hi all existing / ex Marantz SR7000 owners ! I owed a Marantz SR7000 Surround Receiver, and is still happy with its performance. However, the Marantz has been used for some years, and I am considering of whether any possible upgrade is "worth" the money ? My current setup :- Surround Receiver : Marantz SR7000 Front-Speaker : KEF Q50 Center-Speaker : KEF Reference Model 90 Rear-Speaker : Goodman Arena Sub-woofer : KEF Model 20B DVD Player : Philips 963SA CD Player : Arcam Alpha One Power filter / surge protector : Furutech 168 Any suggestion / recommendation ? or in fact I can still kept my SR7000 and enjoy it for some more times ? My prime requirement is "Sound quality" (both Movie & Music), and other "functionalities/features" will be less important.