Jim,
As you're using a JWMiller 8120 CMC (its truly sad that I can recognize it), rated for 17amps, I'd put the Felix in front of the isolation transformer, and run the source components off that, with the higher current draw amps connected to just the Felix. In my system, I run my Soraya 100wpc amp off a Felix, configured almost exactly as yours, built into the middle of its powercord. Though I constantly hear that powerconditioners constrain dynamics, my Felix, in my system, doesn't and offers substantial improvements.
From my limited comparisons, I personally don't feel the OneAC or Powervar isolation transformer offers any additional improvements when cascaded before or after a Felix, and would suggest you you try various configurations for yourself. If you want to provide isolation between components, a separate Felix(s) using a Miller 8109, rated for 3 amps can provide that additional isolation, as well as stronger filtering between source components and amps.
I'm assuming the caps on the long leads are the smallest of the bypass caps. If so, you'd want those caps closest to the CMC, and if you need to have long leads, you have them on the largest of the caps, so as to minimize the lead inductance where most important.
FWIW,
Paul
