dude if you have $1000 to spend on a home theatre system, you can do WAAAY better buying individual components over an HTIB...
as for what you should buy, consult the guys over at AVS Forums...they know their stuff
http://www.avsforum.com/
There are a TON of posts you can search focused around poeple looking for input on what to buy within a certain budget....$1000 is a pretty common budget so i'm confident you will find a lot of info that will suit your specific needs.