Yeah Pete I like tubes but most important, whatever works best in a given system. I'm sure Rick Shultz's mod sounds wonderful as well. The real trick is getting components that work together as a musical whole. I have often discovered in this hobby that things don't always work out the way you might expect. Unfortunately we don't often have the opportunity to hear first in our own system. Interestingly enough concerning the Modwright, I took it over to two other audio buddies to see how it might work out in their systems, I was quite curious. While in both cases it was somewhat of an improvement but in neither was it nearly as revelatory as in my set-up. Both their systems lean towards a warmer presentation with considerably less resolution than mine. I couldn't hear nearly as much improved resolution in their systems, just a general overall smoother sound. One guy was using a stock Oppo 105, the other a W4S. I would venture that Rick Shultz's or maybe Dan Wright's SS mod might be a better fit for them. For me I can't even imagine how much more I would have to spend to get this level of performance, it brought the music to life in a most unexpected way. You never know until you listen first hand.