I have a good history with this discussion. I have progressed through the Sphinx, then on to the Sphinx V2, and now I own the Cronus Magnum II. While I appreciated all that the Sphinx V1 and V2 had to offer, I must rave about the improved sound, soundstage, clarity, instrument positioning, and more that the CM II has above the Sphinx. Again, the Sphinx is a fantastic integrated, award-winning amp in its own right, but the CM II is just a whole other level. My wife could hear the improvement! Tubes just make the difference. I can use all the audiophile accolades to describe the difference, but it's more emotional than logical. I hope this helps, but trust me, you would not be disappointed in making the jump to the Cronus Magnum II. Good luck.