Projection major price points:
$1,000 = 853x480 resolution entry level DLP. InFocus SP4805 or Optoma H31. Great home theater projectors on a budget
$2,000 = 1280x720 entry level LCD projectors. Panasonic AE-700 and Sanyo Z3. Perhaps the most popular projectors as these offer the most affordable 'true-hd' resolution to the masses.
$3,000 = 1280x720 entry level DLP projectors. A host of companies are releasing in this range and all have advantages and disadvantages. Optical lens shift is almost never an option at this price, but they usually use the same DLP chip found on $10K+ projectors.
About $10,000-$15,000(ish): Good home theater DLP projectors. These projectors offer better everything over their cheaper counterparts. Better build, better lenses, better image processing, more connections, optical lens shift, etc.
About $20K+ - Three chip DLP projectors (and LCoS). Better colors, better image clarity. Some, like the Sony Qualia (LCoS) offer 1920x1080 resolution instead of 1280x720 resolution. But, some of these projectors come with high maintenance costs. Expensive (ridiculous!) bulbs, and may be noisy, requiring a separate projection room.
DO NOT BUY RUNCO!
I am pretty much dedicating my life to steering people clear of Runco International that repackages other people's projectors and puts their label on it. They seem to have no clue how to engineer a reliable product. So, you end up paying 50% more, and the projector looks maybe 2% better. But, the projector is almost guaranteed to fail once a month and need to go in for service. When questioned about this directly, Runco's president became very flumoxed and irritated. My experience is over a 90% failure rate of Runco product. When compared to under 5% for other manufacturers.