Hello all. Recently I played some pretty loud music through my Logitech system and was a little disappointed with the power of my sub. This leads me to want to upgrade! So my question is simple, what is a good speaker system that has a nice sub-woofer with it? I only have around $100 to spare and before you say something like good luck please note I don't need a sub that can shatter glass, but I want something with some really good power to it! Current speakers: Logitech X-530 It's sort of nice to have 5 speakers but I don't REALLY need them since I mostly play music and games. That, and the surround sound doesn't do too much good when I can't even mount the speakers beside or behind me. :S Thanks guys!