OK - been working on the XO for this setup.
Up until now, we've been using the 1209-8A networks. Those are pretty dang good, but I wanted something more specifically matched to these drivers and horns. So the exercise has been to play with variations of the 1209-8A, and then I just went to the drawing board and started from scratch. I played with several custom XO designs and still wasn't quite happy with the sound. Finally broke down and drug the active XO out there and tweaked with that until I found something that sounded as good as I could get it (used the wife as the choosy listener since her ears are still like a cat!). That exercise wound up giving the the ground work of a 900Hz XO point, with 12dB Butterworth on both HF and LF.

Then it was over to PCD and model the thing in there, then build some prototypes, etc.

Finally landed on a solid XO that is performing like the active:
new900hzxo