The Vidar is interesting, I was considering it and then for some reason bought a brand new Adcom amp, the 555SE. I'm still breaking it in, but am not sure it would be the best for classical.
One amp that would is the Parasound A21. When I went from my XPA-3 amp to the A21, it was a solid improvement all across the board. I remember the XPA used to give very sharp highs to the point of distortion with some music at higher volumes, something the Parasound immediately excelled at. Used they ask around 16-1800, but the silver ones can go for cheaper. Usually a 3 to 4 year old amp being sold as the owner wants the Parasound mono blocks.
One amp that would is the Parasound A21. When I went from my XPA-3 amp to the A21, it was a solid improvement all across the board. I remember the XPA used to give very sharp highs to the point of distortion with some music at higher volumes, something the Parasound immediately excelled at. Used they ask around 16-1800, but the silver ones can go for cheaper. Usually a 3 to 4 year old amp being sold as the owner wants the Parasound mono blocks.