Mark, have you had a chance to listen to the HDI 3800 speakers? I know that they have a rather linear frequency response, and with their high frequency wave guide, they produce excellent dispersion performance. I'm sure that Floyd Toole was involved with their design, following his experience with anechoic chamber testing in the National Research Council Canada. Moreover, Shady Jim did enjoy reviewing them.
As a matter of fact, because of my age, I've just turned 84 and those speakers are about at the top of my list as replacement of my own designed speakers. They don't take much space and they easily fit in smaller rooms. I'm thinking of going back to stereo, and selling my 7 channel system, therefore looking for a much simpler audio rig in due course. Of course, the Philharmonic loudspeakers are also very interesting but shipping cost might not be affordable.