Anecdotally, Andy at Vintage Tube Services seems to have a very loyal following and I have no reason to doubt the faith people have in his expertise. So far, the good news is, there are several fine options for sourcing tubes. In addition to Cryoset, I am using a very fine pair of 5687 Tung Sols from Tube Depot at the moment and have purchased once from "Old Radiola Guy" on ebay.
For anyone considering a move to tube gear, this should be very encouraging and I would encourage you to make the leap. Tons of great tube gear in the marketplace!
For anyone considering a move to tube gear, this should be very encouraging and I would encourage you to make the leap. Tons of great tube gear in the marketplace!

