I was planning on building a pair of surrounds, but accidentally bought a pair of paradigm titans, oops. So the next project on the list is a powered sub. I'd like to try to build one, as price is an issue, I can do woodworking have the tools etc. I use my system for about 60/40 Music/Movies. I don't need thundering base, I just want to fill in the low end. So what do you suggest for drivers and amplifiers?