Can you recommend some stand-alone phono stages that have the design features you describe? Don’t think I’m smart enough to figure that out for myself, but it would be interesting to give one a try. Thanks!I know Nelson Pass makes a stable phono section; not sure if its a stand-alone product or not. IME a simple way to sort it out is to see if installing a "cartridge loading" (its really 'detuning') resistor makes the sound different. If not, then the phono section is probably stable.
FWIW Jonathan Carr and I had a nice conversation about this topic at Munich a few years ago. There was a nice thread on the What's Best forum about cartridge loading in which he was active (his moniker was JCarr) that goes into the 'cartridge loading' aspect of this issue in some depth. The advantage of not having to load the cartridge that he brought up with me was the simple fact that energy has to come from somewhere, so loading the cartridge with a low resistance was going to make the cantilever stiffer and less able to track higher frequencies. He and I have both written a lot about this topic; its pretty obvious that I simply have to post an article on our website that goes into it with more depth so I don't have to keep repeating myself.