Hello, I have 2 SVS pb12 ultra 2's that are co located. I am thinking about adding a third sub closer to my seating position to give me a little more oomph. I was looking at the Outlaw LFM 1 ex, or maybe the Cadence 15. I'm open to other sub suggestions as well. I need to keep the price under $650. Anyway, would this give me more bass or would my 2 SVS subs drown the third one out? Would this work or be just a waste of money? Any and all suggestions are appreciated. Thanks.