I have oxned both a Bl and now a Xcon, both 18's. I personally like the sq of the XCON over the BL, also it tends to get a shit ton louder, and sound much much better doing it. If you like a low note ground pounding sub I would recommend the XCON, or the icon. Like Mark said they have a great deal going on with 2 12"s and a saz 1500d.