When you enter a entertainment center area of a downtown consumer electronics outlet store, the plethora of options are overwhelming. Everything is shimmering under fluorescent lights, quite new and shining, every system clearly telling you to "buy me, buy me." Even before you reach that milestone of the process, there are several other things that you need to first understand in order to help you make the correct decision for you home theater and for your wallet.
The first thing you need to do is decide what area your home with house your new entertainment theater system. Keep in mind that if you are looking for a large flat screen television around 45 to 55 inches, the best distance for optimal viewing is around 11 to 12 feet. Don't put a 55 inch TV into a smaller room because you will be gravely disappointed and the screen will actually look too sharp and too crisp, believe it or not. However, if you decide you would like a smaller screen, say, 30-40 inches, then it would be ideal for a smaller living room or larger bedroom.
You need to decide on what type of display you want. LCD and plasma displays will provide the clearest and sharpest images. DLP and rear projection systems can cost less, but a major disadvantage in these systems is the viewing angle -- DLP and rear projection do not provide as clear a picture when viewing the screen from an angle. Again, examine your target room where your system will be located, and determine the typical viewing angle for the viewers which should help you decide the best display technology to use.
One other significant aspect is the receiver. Some receivers for entertainment centers have outputs and inputs for a satellite dish and a cable TV hookups, as well as inputs for several kinds of other things, such as media players (VCR and DVD players) and even PC hookups.
Some even have a built-in radio, although these are becoming less common. One of the newer additions to receivers is the ability to play XM radio, although XM radio will require a monthly subscription. So with all these choices, you need to evaluate what is important to you, as well as what you will actually USE. There is little sense, for example, in equipping the receiver with XM radio if you will never or rarely use that option.