So I was lucky enough to demo the Constellation Virgo II tonight in my system. Amazing preamp, run in direct balanced mode, it leaves no stone unturned. Every last minutia of detail is delivered with grace and impact. There is a definitive nature to the sound...effortless, nothing left behind...and the transients are to die for...so so controlled. But, I must admit as superhuman as this preamp is (and worth every penny of asking price), I prefer my ARC Ref 40, which brings a liquidity, a texture, an emotional presence and reality, that makes the balance of Centaur's SET and Class A and Tube and Solid State traits so perfectly coherent and magical....while the ARC Ref 40 may not deliver the last bit of detail and ambiance compared to the Virgo II, it delivers a magically beguiling emotional presence I have never heard in any system....with most of the credit going to the Centaur by the way.