Like I said in the other thread.....I too was doing some research on these two different compression drivers, the BMS-4594 coax and the Radian 950BePB. I could not find anyone on the forums with direct experience with both, but I did find one guy who had some experience with both. According to him, they are extremely close when properly implemented. He said that he would give a slight edge to the Radians top end and upper mid-range. According to him the Radian 950BePB was more detailed, and had a clarity that the BMS-4594 just could not match. He also said that the Radian had a slightly more involving/lush mid-range, but, these differences were very slight. He said that his overall preference was for the Radian, and that his buddy's felt the same way.
With that being said, the Radian 950BePB cost approx $400 more per driver, assuming you pay the MSRP, that is $800 more per pair, or $1,200 for a trio! The guy that I spoke with said that although the Radian was his preference, he did not feel that it was better enough to warrant a $1,200 dollar difference in price for 3 in a typical theater setup.
It is my opinion that the ultimate setup would be three Seos-24's with a Radian 950BePB, (or a Radian 951BePB), mounted to each waveguide with perhaps duel AE TD15's covering the low end. Perhaps when my wife graduates Law School in May and starts working, which is when I would also not have to support two households, then and only then, perhaps I will be able to afford an ubber setup! The hard part will be designing the crossover! Make sure you have a buddy lined up for that!