>>> I ask only because I'm recently buying an amp that has true balanced circuitry but now must find a preamp of the same.
If you can find a "fully" balanced pre that you're happy with, that's great but I wouldn't limit myself to that only. I have a balanced amp and drove it with a balance preamp. Life was good. One day I demoed a preamp that only had rca's and it was much better than the balanced one.
Find the best preamp for your budget and don't worry if it's balanced or not. Go by the sound.
If you can find a "fully" balanced pre that you're happy with, that's great but I wouldn't limit myself to that only. I have a balanced amp and drove it with a balance preamp. Life was good. One day I demoed a preamp that only had rca's and it was much better than the balanced one.
Find the best preamp for your budget and don't worry if it's balanced or not. Go by the sound.