Is the SSA Xcon a good sub? I'm looking for SPL. Was about to order 2 12inch HDC3's then I found the XCON(Why do i always find new stuff lol). I've been told to put a 21 inch(random/huge size) incriminator death penalty in the car, but I'm not thinking I can fit it in my trunk of the grand prix. Everytime I get so close to ordering something, I find something else. Anyone got any info on the XCON?