It might be regarded as anathema to some tube lovers, but I would LOVE to see a reproduction of the late 60's solid state Vox Defiant heads used by the Beatles.  So many cool sounds were achieved on Sgt. Pepper, Magical Mystery Tour, The White album, and Mid 60's Stones albums, with these forgotten amps.  With their inimitable, ratty fuzz, top boost, reverb and MRB features, they were pretty ahead of their time feature wise.  NOTHING I have played through has came close to the sounds these beasts delivered, and with the unwillingness of many techs to touch vintage, non tube amps for service, I would rather have something that sounds like one, except new.

I love tubes, but I also love the Vox Defiant tone.