Earthquake MKIV 12" sub or even 15' isn't "so large". I also like the M&K's for speed, musicality, and transient impact! These are my personal chioces for HT/music sellection. There's a lot that would work very well out there. But the key is in how well you can set it all up!!! The room placment, calibration, and room/system integration will be more than half than 75% of the equasion for getting world class sound from any sub you chose!!!
Good luck
Good luck