For starters, head off to sites like these: Ascendaudio.com, Axiomaudio.com, AV123.com. You can buy pre-configured packages, design your own, and there even some on sale (Today only! just kidding on that part...). All have excellent offerings in this price range, and all have been highly thought of by reviewers and real people. The "best" part has to be up to you, 'cause your best may not be any of ours, etc. You could even go w/ a more top-end 5.1 combo (at Ascend, for one example, where you can get a Hsu sub in the deal) and still have lottsa $$$ left for content.
