@aldnorab Don Sachs D2 linestage takes 4 6SN7s that might be a little expensive to run if you want the best tubes. I have tried Ken-Rad VT231, they are well, not the smoothest in the HF but good tubes none of the less.
@jtgofish If you are looking for dynamic and vibrant in 6SN7 tubes you should look elsewhere, use 6CG7 with adapters in place of 6SN7s