Hi Brokenarrow. I apologize for not being clear on receiver. I sometimes forget that the terms can be confused. I was trying to be gentle, and apologize for some of the others' responses. We try to be more supportive to people trying to understand this stuff. It isn't trivial. Oh, and thanks to Kevin for clarifying.
There is a recent innovation you might want to consider as well. They have recently introduced something called a soundbar. It is a single long and skinny unit designed to be mounted below your flat panel TV. It provides a "kind of" surround effect by bouncing the surround signals off the side walls of the room. It is not true surround, but it is a lot better than your TV speakers. The main advantage is that connections are very simple. You just plug the HDMI from your DTV receiver and BD player into the inputs, and the HDMI output into your TV and you are set to go.
If you decide to go the full receiver route, I would suggest going with an A/V receiver and a matched speaker set, rather than the HTIB route. I have purchased several HTIB sets in years past, and I find that they go obsolete quickly. In addition, they never have enough input connections to handle the next new thing. Take a look at the threads here. There is a wide range of solutions for both receivers and speaker sets. Members here tend to like the Onkyo 60X and 80X series, and the Denon mid range receivers. A lot of members initially buy Polk speaker sets, but Infinity and Klipsch are also well regarded. You will eventually want to add a subwoofer, but that can wait at first. Take a look around this forum for discussions on a lot of this equipment. You can also go over to
AVForums.com Home and head over to their audio electronics area. This forum is more complete, but at times it is not for the faint of heart. People tend to have strong opinions and can be vicious defending them.
If you do decide to go the HTIB route, there are still a few things to consider. First, be wary of wireless surround speakers. It seems like a good idea, being able to eliminate the speaker wires, but a number of these units have had trouble with reliability of the wireless connection. If you are considering this sort of unit, be sure to read the reviews for the unit on Amazon. Look for a HTIB that doesn't incorporate a DVD or BluRay player. The technology is still rapidly changing, and any unit that is built in will soon be obsolete. Another issue is that you would eventually want to replace the speakers in a HTIB setup as they generally aren't very good. Often the receiver in a HTIB setup doesn't have the power to drive real speakers.
However, a HTIB will provide true surround and is a simple one stop solution. If you are the sort who buys something and doesn't need the latest and greatest, this can be a good solution. One further advantage is that speakers in HTIB setups tend to be small, so they integrate well with rooms. Most HTIB setups also come with the subwoofer.
Good luck with this. Feel free to ask on anything we can help with, and be sure to let us know what you decide.