I am replacing my DT Powerfield 1500 sub. My room is about 4000 sg ft with one open side. My mix is 80% music and 20% tv and movies. I am considering the HSU VTF-15h, the Chase ss 18.1, easy to add another so this is appealing to me, and the epik empire. I also have been exploring the ED and Rythmik offerings. I like the idea of duals to smooth out the sound, the Chase is the most economical to add another as the same amp would drive the second unit. I appreciate any advice.