Check Crutchfield too
The Definitive Technology ProCinema 600 system rings a bell, at around $700-800. See if Crutchfield or a similar site sells anything in the basic price range/specifications. Should be decent enough. Good but not great, since you are still not at a great price point IMO.
If you want a better deal on a system that will likely sound a little better, check out Energy 5.1 Take Classics (also on Amazon). It would save you ~$300-400 and rock the house. All you would need to do is paint them white (rudimentary task, btw).