Just curious how many have tried any of the renowned NOS 6SN7's, like the TungSol oval plates or the Sylvania black base 6SN7W's? I thought the Sophias were outstanding until I tried the TungSol, now I can't imagine goign back (although of course I may have to some day)
http://www.dehavillandhifi.com/6sn7_vt.htm