400 Dvd Changer Review Is It Good Deal, $499 For Package Of 400 DVD Changer / 1000W 6.1 Receiver And...?

Is it good deal, $499 for package of 400 DVD changer / 1000W 6.1 receiver and...? - 400 dvd changer review

... 160-watt subwoofer with 6 satellite speakers? The brand is Sony. Is there a big difference in terms of "surround" effect from 6.1 to 7.1 of the system?