Hi all existing / ex KEF Q50 owners ! I owed the KEF Q50 Floor Standing Speaker, and is still happy with its performance. However, the Q50 has been used for 10 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/SACD 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 Q50 and enjoy it for some more times ? My prime requirement is "Sound quality" in both Movie & Music.