escape: I would like to suggest that if you are really serious about doing up a home theater and spending your cash on it, that maybe you want to spend a few days (weeks?) thinking about every section of your theater.
You can do it cut-and-dry easy and just let a sales flunkie (or maybe you'll get a good sales techie) design and SELL you a system. But, that's the issue - they are selling it for profit, picking from their in-house brands, and may not have a clue what is really appropriate for you.
You may not even have an idea of what speakers, sizes, amps, power, video, screen size, video type, and CABLES (not Monster @ retail pricing!) you will need for any of this. But, you can save hundreds of dollars and get a lot more quality if you do some research ahead of time.
You can save thousands if you are doing the installation work yourself instead of letting someone else install it all.
You may want to consider where equipment is going as well, equipment racks, whether you want your gear located right at your TV, or tucked away. What are you going to use to control all this gear? Or, is it going to be 7 remotes on a coffee table? The Internet is a wonderful tool - use it!