Some additional details: have a Mullard CV4003 driver and a pair of RCA Cleartop 12AU7 phase inverters in the ST-120 and also have the Russian K40-Y PIO coupling caps installed. Amp is fed by and SP-13 preamp with RCA Cleartop 6FQ7 drivers and Mundorf silver-oil PIO caps. Phono pre is the PH-16x with Electro Harmonix 6922 drivers and Mundorf EVO coupling caps. Speakers are Tekton Lore Impulse and almost all my listening is vinyl - classic rock, etc.
Curious as to any advice on bias'ing, etc - planning on setting them up at 0.5 initially unless anyone advises differently.