It's going to be a painful move. Based on the homework I've done so far, I pretty much have to choose between keeping my master raw files or keeping my edited images. There doesn't appear to be a way to keep non-destructive edits from Aperture to Lightroom. After much deliberation, I've decided I'd rather keep my edits. I'll miss my RAW files, but I'd rather lose them than have to re-edit everything. What format would you export to? I'm thinking PSD. Possibly TIF. What about the JPGs that weren't shot in RAW? I think those are very important to go with PSD or TIF, so I don't further compress when I export. Question 2: Once I choose between PSD and TIF, would you leave them alone when you bring them into Lightroom, or convert to DNG? Thanks.