I dont know much about sound systems and I need some advice. I can spend between $300-400 for a good systems just to get started. I have a 60" projection TV that has fairly descent speakers. It is in the family room (18ftx16ft) but it is an open room connecting the kitchen and dining room. I've seen sound system package that comes with 5 small speakers for less than $400. Are they any good? What other options do I have? I already have 2 nice speakers (80watts each), is it worth just buying a descent amps and 1 subwoofer and just use my existing L/R speakers for now? Please advise.