For fullness and warmth, you might consider the mullard 12ax7's (nos), it's possible that the newer "Groove Tubes" will fill the bill, as I have not heard them as yet, but their price makes them an attractive option. I have not been impressed with base response or warmth from my Mazda 12au7's, so I would not recommend those to you. Perhaps others can lend some advise regarding the output tubes and the 12au7's.
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