Hey Larry, Congrats on the grange,I'm very jealous. I am still contemplating ordering one myself, as I have been a big fan of DHT amplification for years. My experience with the 45,2a3,300b,845 triodes etc is that they all seem to possess a certain soul,a righteousness if you will,a purity of sound that is hard to describe.Having the abilty to tune ones preamp with the soul of these various DHT triodes has got to be the ultimate front end. Kudos to the brilliance of Mick for pushing the envelope here.I am sure either choice of the various DTH triodes will sound fabulous but I have a sneaky suspician the natural beauty of WE 300b or a nos 45 will end up as the tube of choice here. Mustang..... sounds like your going to have an exciting Christmas holiday and I am eager to hear your thoughts on the voice of the different tubes in the mighty Grange.I am not at all surprised that some of you guy's are finding the mesh plate tube types to be microphonic.Most mesh plate type tubes are prone to microphonic by design.