Tubes for Raysonic CD 168

I have a Raysinic cd 168 tube cd player which is using the Electro Harmonix 6922 tubes. I would like to hear from other Raysonic owners as to what tubes they are using and what it did to the sound. The rest of my system is: Classe 15 amp, Audible Illusions Modulus 3a pre with 6h23eb tubes, Vandersteen 2ce speakers. All interconnects are mit terminator 2 and speaker wire is also mit terminator 2. Power cords and conditioning are courtesy of Shunyata.