Looks to me like your best curves are without any HF boost.
Looks like Robh might be right. Here is a recap of boost with just a cap
green=0
blue = 0.4uF
Aqua=0.5
Orange = 0.68
Yellow = 1.0
Magenta = 1.5
Name: caps.jpg Views: 778 Size: 33.7 KB

Per Zilch's suggestion, here are the results with 0.5uF cap
blue = no boost
green= just 0.5uF
magenta = 0.5uF with 0.05mH (Zilch's choice)
yellow = 0.5uF with 0.1mH
Name: 05cap.jpg Views: 788 Size: 30.7 KB
pumping in anything above 14k just raises 11-12k too much. I tried notching them out, but couldn't come up with anything worth posting as by the time I got the 10k notch tamed, I lost most of what I had gained above 15k.
I think at this point I amo going to work on getting the speakers finished and in the room and then maybe play with the XO more after listening to music.
(Now there's an idea!)