best 12ax7 tube with jj el34l for Jadis Orchestra

Trelja's response in a pm....

Yes, the 5751 sound the best of any variant, with the Sylvania triple mica black plate at the top of the heap. I wholeheartedly recommend them. Some will mention they have lower gain than a 12AX7, and if memory serves me correctly, I think that I did notice that in the JOR, which may keep you from using them in that application.

Believe it or not, the triple mica Shuguang 12AX7B, that regularly sell for $10 - $20 is one of the best sounding variants you can buy, and supplant a lot of the old standards, including Mullard. In my estimation, they're truly a no-brainer, so if you don't want to pay 5751 prices or don't want to absorb any loss of gain, I suggest you give them a try. I think you'll be quite happy with them.

Indeed, Matt contacted me offline, as Michael suggested, with my feelings above...

The Doctor (Mechans) and I evaluated those Shuguang 12AX7B when they were newly introduced, and they simply floored us. In fact, because of that, we organized a 12AX7 shoot out, where maybe 15 - 20 (WAY too many) folks attended. We used the Jadis DA60 as the test mule, with the tube under evaluation in the amp's driver positions. Interestingly enough, opinions across the group proved quite consistent. The Shuguangs made the final round, placing in the top (along with Telefunken ribbed plate, and the ultimate winner Sylvania triple mica black plate) 3, knocking out some truly (Telefunken smooth plate and Mullard) surprising contenders.

I just returned from a short trip and found the new Sylvanias already delivered.
I emptied the truck, went in and installed them, turned on the music, and left for a quick bite to eat.
Everything was warmed up when I got back.
I just wanted to say that even after only 2 hours, these tubes are sounding very nice.
I am going to sick back and relax and listen to some of my favorite tunes.
Thanks folks.