I'm looking for some reasonable way to evaluate and also just to look at slides, but I don't have room to set up a projector and big screen. I see that B&H, Adorama, etc., sell some combined projector-viewers for ~$350. For example, this one. They seem to be a projectors but with the addition of a built-in flip-up screen. Are these things any good, or should I just buy a light table and a loupe? I have both Kodachrome and Velvia slides, if that makes any difference.