Nice Project!
One suggestion I'll make ( even when bi-amping ) is to include a 10 to 15db pad with a bit of HF compensation ( a capacitor wired as a by-pass over the pad ).
Doing so will help re-align the 2 ( different ) sensitivities ( dynamic capabilities ) by offering a more cohesive ( combined ) wave-front .
One can check for this dynamic cohesiveness ( or lack of ) if one is used to things like the sound of live orchestrated woodwinds ( specifically those instruments using reeds ).
- When their harmonics ( mostly coming from the horn driver ) get out of whack ( & overly dynamic ) one's ears will rebel ( assuming one is familiar with what an oboe sounds like.