I am still pretty new into this field, but I have narrowed it down to these 2 subs. I already have a few adire products, and I am very happy with them, however, I have heard many good things about the servo-15 as well. From the looks of it, the kilimanjaro should be much louder (3 inch peak to peak vs 1 inch peak to peak), yet the SERVO-15 has had an outstanding reputation built up over the past years. Am I right to assume the SPL gain in the tulmut over the servo? Does the XBL^2 technology match up to the closed loop servo-15 technology? If they are pretty much the same, I would assume the servo-15 is the best choice because of the price difference. Also, what are the differences between Paradigm's Servo and the others?