Hey guys, I have a ksw12 sub, athena fs2's, and the rest of the athena lineup. I was considering the buying a better quality sub like a velodyne, but I want the same amount or more volume with lower frequ response and an overall smoother sound. Would it help if I bought another ksw12 to blend in my lows better or just get a better sub altogether? I am trying to stay in the original budget of 500$ to 700$. Oh and I have a yamaha htr 5740.