joslyn,
I use a DVX100B for exactly this purpose. I shoot video tours of homes. I prefer to go manual because the iris adjustment isn’t very smooth, it is a little bit choppy on this camera. It also depends on your shot and the window placement–that is usually what creates the issue. Anyway, I point the camera to the room and set the iris on auto so that it sets it right for the room, then I swtich it to manual before pointing my shot at the window. It might a little blown out, but it is better than the iris adjusting choppy or not fast enough. It can also make it look like something is wrong with the lighting to the viewer, the camera operators are the ones who know it is the iris. Test out your shots and see what you like. Also, if I want to see the outside view, or it is really, really bright, I might use auto or adjust it down a little. I hope this helps. And when you find out about the 24p, I’d like to know. I’m shooting 30i right now and haven’t really experimented. I export to television and the web.