I was mesmerized by the Viva Verona 845 based amp used with my Avantgardes, along with their very fine phono stage and preamp. The sonic performance achieved prior to this was fantastic in many ways. But with the Viva inserted, the overall performance transcended analysis and instead left me with the emotion, vibrance, and presence of real music, real musicians. The most realistic-like sound Ive ever heard. These amps are worth checking out. Also, I understand that the Viva Solista integrated, also 845 based, combines the circuit of the Verona with the circuit from their preamp, and gets close to the sound of using these separates. I have yet to try the Solista, but have good faith in the person who mentioned its sonic attributes.