Screen Size and Viewing Distance
 The viewing distance and screen size are crucial in providing the picture clarity and the quality of the viewing experience. It should be mentioned that DVDs are NOT high definition (HDTV DVD players have just started shipping), that's why it is necessary to choose an appropriate viewing distance to achieve proper image clarity from existing DVDs. To get true High Definition TV images you should sit as close as twice the diagonal screen measurement. If you also watch a standard broadcast TV (not HD), then your seating distance should be at least three or four times the diagonal screen measurement for achieve the proper image clarity. DLP or LCD Rear Projection Sets for Brighter Rooms
With a DLP or LCD widescreen HDTV rear-projection set with screen sizes of 43 to 60 inches (diagonal) you can achieve a bright, high-contrast images in rooms with ambient light. They are more useful than a front projector, which requires a totally dark room. If you don't need a huge image choose high-quality HDTV rear-projection DLP or LCD sets which cost about $2,500 for a 50-inch diagonal image. Flat-panel LCD and Plasma screens also provide bright images in a lighted room but they have limited screen size (to about 60 inches). There are also front LCD or DLP projectors with 120-inch diagonal images or larger. Front Projection
There is no doubt that a huge theater-like widescreen has an incredible impact but you should have a totally dark room if you want to use a front projector. Ambient room light which will be falling on the screen can cause blacks and the shadow details can be lost. But if you decide to arrange a totally dark room then choose a compact DLP or LCD front projector. It is reltively inexpensive and convinient and gives a stunning and quality picture. Considering a Screen for Front Projection
If you are going to use wall for projection purposes you will probably need it to be painted in special and expensive paints which are manufactured for these purposes. But dedicate screen will provide a better contrast and image brightness. You can also invest at least one thousand dollars in a retractable screen which can be electrically lowered or raised out of sight. Sheetrock or Wood-Paneled Walls and a Wood or Carpeted Floor
Don't install poured concrete floors and walls, because they may produce boomy and exaggerated bass. For the concrete floor choose the wood sub-floor covering and carpet for absorbency. Cover the cement-block walls with studs and sheetrock, drywall or wood panels.
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