Well since I originally posted my question re low noise tubes, I've tried a host of NOS tubes. I'm now using Phillips ECC83 from v1 through v4 with very good results. Neutral, reasonably quiet and extremely revealing. With the exception of a set of GE5751 in the v1 position, I suspect it won't get much better. I am however assembling the K&K SE phono stage and am looking forward to it's performance.
