Quote:Depends.. If you like a warmer sound vintage Mullards (haven't tried the re-issue). More detail Telefunken - RFT - Gec. Which tubes are in your V70se now? I find the Sovtek 12ax7lps input to be very forward and quite detailed.
That being said it's all about total system synergy and your personal taste. I would also caution against using Eat KT88's and vintage Tesla's due to the higher plate voltage the Octave has (540V) for output tubes. I have been told even though those tubes are rated at 600V max they were optimally designed to run at 450V.