umm... Sovtek Chinese tubes?!?!?
Sovteks are not chinese, but I digress.
He is right about Boogie slapping their name on a Sovtek tube, albiet one they tested, but still a sovtek tube.
I have just installed a full set of JJ Teslas in my Mesa 20/20 power amp as well as my triaxis, they are a good tube so far, I seem to have a tad more midrange than I did before, but aside from that, they seem fine.
Time will tell how they weather the abuse or lack thereof that I administer.
I liked the Sovteks, and would and will probably buy them again they are solid and inexpensive, but you can bypass Mesa to get them obviously.
I also just did a repair on a friend's Fender Blues Deluxe that had EH's in it and those had a nice warm feel to them in that amp, then again, its not dialed in for gobs of gain either.
I tried 2 different places for my tubes and had luck at each
Both shops have a good variety of tubes and their pricing is competitive.
Without having each brand to a-b to one another, it is hard to say that brand X sounds better than brand q but burns out twice as fast as brand f, I don't have the time or inclination, I think few people do.
Grab what you think will work for you, btw, just so you don't blow your cash on NOS stuff, I have a new set of Mullard 12ax7's and if there is a tonal difference between them and the other tubes I've used, it is a VERY, VERY, small, subtle one, yet I see them sell for $30 on up. if someone wants to pay me for them, fine, but I don't think you gain anything by going that route.