I'm wanting to add a sub or two to my system since I am using nothing right now. I have a 15 that I have used in the past but I dont feel it was a great match for my setup. Im looking at a few different options and I have very little money to spend. I looked into those Dayton 10" subs that partsexpress sells for $100 and I dont think one would make me happy but Im thinking that I could put one under each of my mains and maybe that could work. The other option I am exploring is custom building a sealed cabinet with either a pair of 10", a single 12" or possibly a pair of 12's with a single 250w plate amp. I have the tools and ability to build the box since I used to build custom sub boxes for cars but Im pretty foggy on what would be the best match for the rest of my setup. My system right now consists of 3 Design Acoustics PS-8c (8" 2 way) speakers for mains and center, Jamo Sat500 4" 2 ways for surrounds and a Sony 5.1 reciever whose model escapes me but it has 100w x5 power rating. My theater area is about 20x14" but is basically half of an open area twice that size. I would appreciate any input.