OK, I have talked via email with SVS. Based upon what I have for room size, current gear and so on. He recommended the PCI 20-39 or the PB12-NSD. If I want to go smaller, then the SB12-plus. Right now, the PCI 20-39 cylinder is what may make the most sense due to space constraints and so on. Even though it is more than I may want to spend, I do want to get what would seem to be right. Another option is the HSU STF-2, it is less costly and so still one to think about. But the PCI 20-39 cylinder still looks like a good way to go due to room in the room.