I am using the 5998 mesh-shield Tung-Sol's and JAN-Phillips 6SJ7WGT, so fair comparison I would say. I admire your passion though.
Like I said nothing that I own(tube) sounds better on the 650s, but don't knock the Lyr with the right tube on the He-500s it is very good and far from "muddy" and the if the Emotiva (have not tried) sounds as good as the speaker taps from my vintage receivers, do not knock it as well at 1/2 the price of the 337.
5998 Tung-Sols? I bet you paid a pretty penny for those. I had a terrible time tracking them down when I had my little dot MKVI+. Heard nothing but raving reviews on those.