I am going to biamp so relative eficiencies aren't real important in my case. My understanding is that these Gold Ribbons are not as efficient as the BGs, more like the original Carvers at 82-85 dB/W/m.

I am not after very high SPLs...would guess average of 70-75 dB at my seat, roughly 12 feet from the arrays in a 13' x 17' x 8' room with the center array dead against the center of one of the long walls and my listening couch pretty much against the opposite long wall. I just don't have room for the arrays or my ears to do the 1/3 out from the wall routine...would need 20' x 30' room to satisfy my listening distance preferance--maybe one of these days.

I didn't know too much about Trinaural either until about a year ago. I read a review in Sensible Sound which was about the most complementary I have ever seen for any audio component anywhere and by a usually very sober objectivist reviewer (David Rich IIRC)...so when I spotted a demo unit for sale at a discount I jumped. So far, I have only been able to use the Trinaural with some older Tannoy monitors, but the improvement in soundstage width and solidity is real and shows great potential. The Trinaural even won Best of Show at a recent CES when paired with VMPS Elixer line sources, so I thought....

Thanks for your input,

David