Mapman, thank you for taking the time to analyze my system. I really need a honest analysis. I am considering staying with Simaudio and upgrading to the W8 by Simaudio (2x the power). I have listened to the Diavalet Class D, but not on my system. The sound was very crisp and clear, but a little to digital sounding. Although, I listened to a CD and not analog side. This is the battle I have had. Will I get a 10,000 difference by upgrading. Difficult to find a dealer that will loan me the amp in order to listen to it. I am not about to drag the Ktemas in for a listen. Again, thank you for your feedback.