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In our corporate world, we have a few high-end Eiki's but I've seen a few of the smaller InFocus ones being used. Try to have them demo the model to see how loud the unit is. They run super hot and the fan can be noisy in lightweight units. Think about getting the highest capable resolution you can afford. Also price out the cost of replacement bulbs. They are usually modules and can run a couple of hundred $$$ each. Make sure it goes through a cooling cycle before you shut it off. I would get a good hardshell case for the unit if you plan to tote it around campus. The optics and image generator are sensitive to vibration and knocks. One of our units bolted to the ceiling next to an air conditioning unit has its image shifted slightly green because the dlp array got out of alignment and it too costly to repair.
Good Luck.
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