There is not an affordable DLP projector with wasting money one. Cheaper DLPs have major problems processing the colors yellow and green, they turn out as gray. Although most companies have fixed the problem on their height end models most have not corrected it on lower end models.
But even high end model require proper maintenance for the best performance, like the air flow or the overheating problem. When you are considering buying the best one, you also need to take note on the life span of the projector lamp.