I don’t know why you wouldn’t go MXF directly if you have the chance as it will cut down the overall transcode/import process by half as well as not double the number of hard drives.
That being said, Avid QT wrapped DNxHD was the first method by which RED and Avid worked so it is a known method – be sure to import the ALE first, then batch import the QT files into it fort all the metadata preservation goodness.
Michael
Michael Phillips