I have been converting to DNG just to ensure future compatability. File size really isn't that important (storage is cheap these days) so I embed the original CR2 file into the DNG in case I ever need the original.
If you are ever in a situation where you will be using your photos in court it is best to have the original RAW still intact so that is can be confirmed the file has not been editted in any way.
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Brad Dudenhoffer
"All you need is Peace, Love, and a solid monopod,"
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