I also own a DSLR. I found out it is invaluable for everything on the set.
there are two considerations that I had in mind when purchasing, the so called D-range (aka f-stop latitude) and the possibilities to post process the image. I knew only a DSLR would have f-stops close to film. being used to darkroom processing I found it to work very similar to a good reversal stock, meaning that details washed in the overexposure are lost. I also found the Nikon cameras deal much better with the grain structure, leaving the graininess where it belongs as opposed to other manufacturers that digitally filter the noise, for a washed, flat image.
a very important aspect of this is the software available for the camera. it was very important for me that it would be compatible to the KLMS software, by Kodak, that emulates the look of the film. do not take it as a joke, the images processed this way are really something! in this respect there are only to brands, besides Kodak, to comply, Canon and Nikon.
in my opinion the best deal now is the Nikon D80, much better equipped than others in this price range. it is light and small enough, has the features of the next price tag, it comes in good all purpose kits, but it is not dust and water proof, which I find to be rather inconvenient. the prices for this camera are dropping as the next generation is raising, so it could be a good deal.
misu