Since the 4BSST3 is about to be on the shelves, so to speak, there will still be some 4BSST2's available. Since the SST2"s are discontinued there might be opportunities to get an SST2 at a discounted price. I would find it hard to believe that that the cubed version offers significant sonic improvements over the squared version unless one has a very critical ear. Then again maybe I'm wrong, but I will be shopping around for a new discontinued 4BSST2 to replace my 4BST in the second system, giving me two SST2"s to upgrade, if there are rave reviews about the improvements in the cubed version.