You don't mention what speakers or preamp you'll be using, or how much power you require, so only a general recommendation can be made.
First, is the Belles 350A Reference (or 150A Reference). While I don't consider it "dark", I do consider it to be on the warm side of neutral...certainly with forgiving highs. The 350A Reference will run you about $2000 used. The 150A Reference about $1500 used.
Another option would be a McCormack DNA-1 or a DNA-0.5
First, is the Belles 350A Reference (or 150A Reference). While I don't consider it "dark", I do consider it to be on the warm side of neutral...certainly with forgiving highs. The 350A Reference will run you about $2000 used. The 150A Reference about $1500 used.
Another option would be a McCormack DNA-1 or a DNA-0.5

