The 901 series was the best system Bose marketed, although it is indeed a "special effects" product. There is no scientific foundation for the driver configuration Dr. Bose promoted. I forget the exact ratio of direct to reflected sound the 901's were supposed to replicate, but it was based on the ratio that Dr. Bose thought was present in a real live orchestra hall. What he forgot, or chose to forget, was that the reflected sound in a hall comes from the pure unadulterated direct sound of violins, brass, and winds. The sound that gets bounced around in a 901 is a recorded signal that already contains the ambiance (reflected sound) of the recording venue. So you're bouncing already reflected sound off of the listening room walls and getting bounced-bounced sound. In addition, all that rear-wave bouncing tends to create a cancellation in the midrange that introduces a somewhat hollow coloration to the sound. But the 901's can sound really interesting, and in a manner that you're not likely to get from a conventional forward-firing speaker. So if you like what you're hearing from the 901's, I would stick with them.