I do know that in the thousand dollar range you can do better than 1024x768.
Mostly you should be concerned with the lumens and the contrast ratio.
But just like LCD's, the manufacturers tend to lie a lot.
If you only plan to use it for 5 days in a year, get the cheapest thing you can find at OfficeMax or Staples. One year later the technology will have improved.
Eventually your boss or Master Bean Counter will get tired of the low-end and tell you to buy something really good. Then you can get a unit that will last for several years.