Not knowing what involv3ment you're willing to make in this, ZVOX proviesa excellent one-box, minimum wiring, answers to your situation. It's kind of a sound bar, but a bit simpler and, IMNSHO, a simpler and more elegant solution
http://www.zvoxaudio.com/?gclid=CLPo1P7I4sYCFcaRHwodDJIPZw
These aren't the equal to a true component system but, given your budget and lack of clarity as to exactly what you want, they will work great. A perfect "sound device".