Eastern Electric Minimax. I have been using one for almost 10 years, Amperex 12AX7 or Mullard 12AX7 as the driver and GE12AX7 or EICO (Amperex made for EICO) 12AX7s for the buffer tubes interchangeably for the 10 years without any issues. No discernible noise at all without music playing, incredibly dynamic and transparent. MM and MC. I have no idea how it can be bettered and why I would bother.
