The system is geared towards my listening habits - classical (33%), jazz (33%), and acoustic pop (33%). After a long period with little change to the system, late 2006 and 2008 brought an urge to make some upgrades. The final future steps may be to upgrade the AZ power cable to a Nordost Valhalla cable, and move up to the Valhalla speaker cables (although interested in thinking about alternatives...). That will pretty much do me... I hope! Any thoughts on rounding off this system appreciated!!