Yes, the MZ2 with the NOS TungSols and either Brimars or Mullards sounds absolutely stellar to me......but then I've not heard a SET amp with my system yet so I bet there's still room for improvement. Teajay's suggestions have been spot on and while I'm loving the sound of the MZ2 driving the DI's I need to hear what that extra meat on the bones brings to the table. My system sounds better than ever but I'm still searching for that perfect balance of great bass, dynamics, tone, texture, airy highs and realism. At this point I the MZ2 provides great bass, dynamics, speed, realism and tone. The TungSols increase the size of the soundstage and add to the texture, tone and bass. The Mullards bring even more texture and warmth while the Brimars excell at high end detail and air. Combining the Mullards strong points with the Brimars would be ideal and I'm hoping a SET will bring bring to the table what the Mullards do and I can get it all. I know......I want it all! :) I need to have you over to hear what sound I have now and get your advice as to whether or not I'm going in the right direction. Going from 1 watt per channel to a whopping 3.5 watts is a huge!
Great write up Bill. Sounds like you have a sweet amp on your hands and it makes me want to add an amp to my system even more now.