@serious7,
That's quite a interesting setup you have, btw great system. I bet your system sounds phenomenal.
When i went from all solid state (Classe, Krell) to all tube ARC setup, I was in same dilemma with my power hungry monsters - B&W 800D2. First thought was to change the speakers but I wasn't quite ready to give up my beloved 800's. Since I prefer not to use a sub for 2 ch audio, I end up going the bi-amping route with Class D (LF) and Tube (MF/HF) amps. And this is by far the best setup i have had in 15 plus years of tinkering in high-end audio.
In fact, I have managed to surprise few friends on how good 800's sound with tube amp feeding the mid's and high's and Class D powering up a pair of 10' bass drivers.