I'm pretty ignorant right now about portable video projectors; however, I find that projectors with DVI sound like a good feature--except that I don't fully understand the advantage over non-DVI projectors. And what is DVI-1? I'd like to have a portable for rooms with 150 people capacity, playing DVDs from a laptop. 2000 lumes is the most I'd need for brightness; my budget would preferably be no higher than $1,500. Choosing between DLP and LCD leaves me muddled. The best I can ask is what do forum members use for traveling presentations with similiar settings?