Understand fully. One of the problems I'm starting to realize is that room effects have such a large effect in demos---that it is really tough to figure out how they will sound in your room.
I've heard lack of detail on some systems---but know at home once i treated the room, got tremendous amounts of detail back.
At this point, I will probably just have to bite the bullet and get a few speakers in my room to compare.
KeithR