I've had my my Luxman L-507uXII for a year now, and thinking about adding a DAC or Pre-amp (speakers Focal Aria 936, Cambridge CXN v2 streamer, Mofi Ultradeck w Mastertracker cartridge). Happy with the system, but like most of us, looking for a little more. Not looking to get rid of anything, although I might consider an upgrade for the CXN with a higher quality DAC/streamer. What have you found to kick that Luxman up another step?