What would give me better bass SPL and extension, one Tempest (or other quality 15") in a big corner loaded sonotube or two medium sized boxes each with a Shiva (or other quality 12") used as stands for my main speakers? OK, I know this question is vague, but this is my dilemma. Build the easier and cheaper big sonotube and stick it in the corner, or build two 24" tall box subs to act as stands for my nOrh 6.5s. Will I have to give up bass performance, if I build the two boxes given the size and placement limitations that using them as stands creates? I think I would rather build the two box subs because they would be more attractive, and I would have to build some decorative stands for the 6.5s anyway. If I go with the sonotube, I could fit something as big as Andrew Pratt's Sonosub2 in the corner of my living room. If I build the two boxes, they would have to be 24" tall finished. They could also be 24" wide and even more than 24" deep. I have a medium size living room in my house, with a cathedral ceiling and opening into my dining room and entryway. I don't have any experience in this area and I am looking for guidance and advice. Any help is appreciated.