I plan on building another sub for music only. I will evantually be pairing these up with some DIY monitors or Studio 20s. I am having some trouble deciding on the driver and alignment. I am only considering sealed this time. I have it narrowed down to a Shiva or a Tempest. Which sounds better for music only? Is the 12" Shiva faster/more musical or are they essentially the same except for the Tempest having the output advantage? If the Tempest can be just as musical at normal levels I will probably just spend the extra few $$ so I can have that little extra output and evantually use it in an IB with my other Tempest. I am also having trouble deciding on the alignment. I know a low Q will be the tightest and most accurate, but I am worried about a loss of punch in rock/hip hop recordings. Should I be concerned?