There are two main types of projectors on the market, DLP and LCD. DLP stands for digital light processing. It was invented by Texas Instruments, and uses a microscopic array of over 2 million mirrors. DLP has a higher contrast than LCD, but there are some unfavorable consumer reports that note something called the "rainbow effect". The "rainbow effect" is noticeable when viewed from one side of the screen to the other, and are characterized by a sudden color.
LCD stands for liquid crystals. These projectors have three distinct glass LCD panels inside, one for each component of the video signal (red, green and blue). While DLP chips reflect light LCD panels allow light to pass through them. LCD projectors produce brighter images, and they are known for having excellent color saturation. Ultimately, you will be hard pressed to notice a big difference between the two types of projection systems.
When you buy a new projector, keep your special needs at the forefront of your thoughts. As we have mentioned above, it is really easy to lose yourself in the minutiae of each system. Connectivity is one definitely something to be aware of. Make sure you are able to connect all your components, including your gaming system. Nothing beats playing Halo in real life size! Contract ratio is another important factor, the higher the ratio, the better the image will be.
The brightness of your projector is another thing to consider. Light output is measured in ANSI (American National Standards Institute) lumens. You want to avoid a projector that produces anything shy of 1000 lumens. As you probably know that the projection resolution is extremely important. This refers to the number of pixels that can be displayed on the screen. Go for something that is nothing less than 1024x768, as this will allow you to fully understand the depth and quality of HDTV. Ultimately you should buy the projector that is consistent with your needs and your budget. Soprano's coming on right now! Time to go!