AUdio research LS7 Tube replacement

These should work well. I use them in my ARC LS-22, they sound much better than the Sovteks and the JAN Phillips I have tried. Not bad for the cost.
Sturgus

http://www.tubemonger.com/Matsushita_Japan_6922_E88CC_Mullard_Tooling_NOS_p/591.htm

clickable link to the above^^^^^^^^^^^^^^

http://www.tubemonger.com/Matsushita_Japan_6922_E88CC_Mullard_Tooling_NOS_p/591.htm

My favorite tube for any of the ARC units that use the 6DJ8/6922 series of tubes are these:

http://www.upscaleaudio.com/Rocket-Logo-6H236922_p_48.html

I have tried ALOT of different tubes and still go back to the above.

What about NOS tubes?