i dont think you can get a sub as good as the spl even with 2 lfms. you yourself say 700 online for spl1200, that is not much more than the lfm anyway.

Curegeorge, is a funny guy. I've read alot of his posts, and I kinda think he just likes to argue. However, I can tell you from experience of owning an LFM-1, that is does blow away alot of the more expensive subs, and two does definately make a difference in the volume of bass as well as the low extension. I would audition as many subs as i could, but you will never go wrong with the LFM-1, it's an incredible sub.