Long time 6SN7 fan and tube roller. I happen to run a Modwright LA-100 and like it very much. I have run every 6SN7 and I mean every! mentioned above. I stumbled a crossed a Don Sachs forum thread and for the first time heard of a tube that got rave reviews from NOS snobs like myself, that I had not heard of nor tried. The Shuguang Dawning Series WE6SN7 PLUS. Bought a pair on line from a Hong Kong dealer, let them burn in for 150 hours and was absolutely shocked by what I heard. They replaced my beloved NOS Tung Sol VT-231 Black Glass Round Plates. These inexpensive Chinese tubes were better in every way. Sound stage much more open and spacious, great balance top to bottom with lush but not overblown mids. Great bass and beautiful extended highs without harshness or glare. I had tried every 6SN7 and these were by far my favorites. In fact bought a second pair that I now run in my Modwright Oppo in my main system. Just a heads up....these tubes are huge for a 6SN7! They are beautiful but in my LS100 I had to cut holes in the top for them to fit....no big deal as I had already cut a whole in it to fit the Mullard GZ-37 Fat Bottle rectifier I am running. In any case, this Chinese
WE6SN7 PLUS is an incredible tube!