I am considering buying the sub in question. I was wondering how it would compare to say an SVS 20-39 pci (that's the biggest damn sub I would ever consider buying). I much prefer the configuration of this sub compared to the HUGE SVS' but, if the sub is inferior I may still go with an SVS. Also, this sub comes with the 12" Adire Shiva driver, I was wondering if this is the best driver to go with, I saw someone else on this forum that built pretty much the same sub, but used a 12" Dayton DVC instead. I was wondering if there would be any benefit to using a different driver, or if it's just a matter of taste??