Just bought set from Apos. Very attractive pricing and representations on quality.
@audition__audio , Yes, that's true, but I've had a few issues with NOS tubes (test strong but microphonic). I have a sensitive preamp. What's more, I have heard some of the Linlai and Shuguang higher end offerings and some of the rival NOS if not beat it, IMHO.
None of my post is meant to binary--one tube over the other, China better than Russia, NOS not available at all. I just meant it's nice to have options and the Chinese are making great tubes--Linlai and Shuguang have some interesting stuff.