I think you budget is a little to tight.
That is a pretty good sized room and most HTIBs do not put out near as much power as their wattage would suggest. Also, they come with speakers that you will not use if you want in the wall speakers. A HTIB is no easier to set up than individual components, it just saves you some shopping time.
I am not a fan of in wall speakers. I have never heard a really good sounding setup. You will not be able to move them if you move or change furniture. It will be pure luck if you get the proper speaker placement for good imaging. As big as your room is, you should have room for speakers. A subwofer can be placed just about anywhere.
You could buy a relatively inexpensive receiver and DVD player, but spend the majority of your money on your speakers. Remember, it is only the speakers that you hear. You have an impressive TV, you should have an impressive sound system too.
Search the RoadRunner6 posts on speakers in this forum. He always has some great recommendations in all price ranges. Bose is not one of them.
I am looking for a surround sound system for my 18 x 20' room.I really think in-wall speakers would look better.Can someone please recommend a system for me? I would like to spend under $400-$500 on DVD player,4 IN-WALL speakers,center channel,receiver and subwoofer.I have a new 50" Panasonic plasma tv.
I shop on EBay often.
I appreciate any suggestions.HTIBS would probably be easier for me to install.
I appreciate the replies.I was eyeing Concept-6 speakers earlier but have not bought anything for sound yet.