I bought the Master Edition for my headphone system a few days ago. My main system has an Aurender N200 and Audio Holo May DAC. I really needed something smaller for my desk and didn’t want to spend a ton of money. The Master Edition improved the clocking and provides better op-amps and I’m told the improvements are worth it. We shall see! I can always sell on the used market without a huge loss if it doesn't pan out!