Excerpt: Since Dell, one of the largest computer builders in the world, got into the projector business, I've been wondering, what does Dell know about projectors? It's an entirely different market, isn't it? Well, after we put Dell's best projector, the 4100MP ($1899), through its paces here, I've come to the conclusion that Dell knows a lot about projectors. A whole lot. There are features in this unit I haven't seen anywhere else. Let's take a look. The 6.5 lb.