I have a 12" L7 and I am starting to realize the sound quality issue. I am looking into getting a sub that is comparable to the W7 but not with the price tag. I have been looking at RE audio XXX in 10, 12 or 15 as well as there other models; I have also been looking at avalanches,brahmas image dynamics and others what do you think I should get? I want something with great sound quality but with awesome spl as well