The best is to buy everything seperate but you also need starting about $3k for a 'good' 7.1 system with reciever & it looks like your on a budget sooo the best HTIB are Onkyo. They range from $350-$800.
I need advice. I had a Samsung 5.1 surround sound system HT-50X I think. It was not a very expensive set but sounded great. I blew the board on a freak walk across the rug touch the set and shock it event, very annoying. So now, I am thinking about the Panasonic SC-BT200 set up or perhaps a separate receiver for 7.1 and a blue ray. Please give suggestions on what would be better. Also, if I go with the SC-BT200, should I use the Panasonic speakers or the Samsung speakers? I am looking for the best sound with those options. Money is a very important object.