Congrats on the start of the new forum. Looking forward to the discussions.
I found the Circle when I took a "detour" from my MMGs to a pair of single driver Tektons, enjoying that forum. Now that I'm back (for good ) using the Maggies, this will be very helpful. Good deal!
Yup... I also gave single drivers a try out of curiosity of what might be possible beyond planars. Still have a pair of Fostex-based Tektons, but not in the main room where the MG1.6 dominate.
Tried the high-eff route as well when looking for a planar alternative including the open-baffle Hawthorne Silver Iris (close but no cigar) and currently a pair of big gorilla coffin horn-tweeter pro-driver 3Pi (about as opposite a Magnepan as you can get, but the constant directivity design is promising enough I got parts to build a pair of 4Pi).
Maggies still get the nod at this time.
Also have a pair of tweaked MG10.1 that are supposed to be used for rear channel use, but I never seem to have my multi-channel stuff up and running.