First off 90% of what I shoot is aerial, a trip could easily involve 4 or more different clients, I also run an image library, this is where Aperture scores over everything else I have tried.
I would hate to give up Aperture
DNG is a bad joke in Aperture, although it recognises DNG, it can only convert Dng files from cameras it can convert the raw files from.
LR I find a bit light on the DAM side of things and I'm so far into an Aperture workflow of organising jobs and archiving the library a change would be a very big step to make, especialy as it would be a backward step on the DAM side. I'm surprised Phase and the like don't think further than turning a raw into a tiff or jpg, users must want to organise, retrive, search, ftp, email, burn to disc, backup, group etc like the rest of us and not just after the shoot, but 6months or 10 years in the future as well. As it stands Leaf is the only choice as it does work with Aperture, non of the others work with anything as powerfull.
Kevin.