Yes...good point, though I am still young enough to experiment. As well, to return to the LX5s if I do try the N1200s would be as simple as disconnecting and reconnecting a few wires, since everything is easily accessible at the back of the top cabinet housing the LE85s. Nothing to open up or unscrew. Maybe, I'll just try it for fun and report back with my results.
First step, I agree is to add the 3106s and 2405Hs to my existing setup and listen and tweak.
4313B: thank you very much for the schematic; no change as you said, but nice to have the documentation.