lense. The TS-E lenses are tilt-shift lenses which will allow you to correct for optical distortions. I would have said the Canon 30D, but the Rebel will help keep it within your $2,000 ceiling. Unfortunately, three flashes with remote control will boost the price beyond the $2,000 mark.
I shoot virtual tours and still photos for Realtors with a Casio Exilim EX-P600 and available light. I'm tired of using photoshop to cut in windows. I would like to buy an SLR for $1000-2000, easy to use, that supports three external flash units, to match the indoor scene to the outdoor scene, to include the exterior view through the windows, instead of a nuclear white blare. Also, what lens would you suggest, to get as much of a room as possible, without noticeable distortion? The Nikon D40?