OP,
Reading these posts is giving me a headache. It's because most of the good advise given is about getting the best outcome from your hodgepodge of components/speakers which do not collectively, in any arrangement, have the capacity to provide a nice surround sound experience. At any rate, if I were you, I'd start fresh. I'd buy an AVR in the highly competitive $500 arena and a pair of book shelf speakers for stereo pleasure, from a speaker brand having sub, center, & surround speakers that sonically match the main stereo speakers, which can be purchased as your budget allows. JBL and Klipsch have very inexpensive high quality speaker lines which will permit this surround sound system building strategy. Now, of course, if you have no income for this expenditure, then, buy used from Craigslist, soliciting someone in your circle of friends who knows something about surround sound systems to preclude you from making a mistake. If you watch Craigslist regularly, I would not be surprised that a very nice name brand system could be purchased for a few hundred dollars.