I'll stick with the .flac format. I have more than 3500 tracks and it would be a waste of time to change them to anything else. That said, I may not convert anymore tracks to .flac, so long as Power Amp recognizes them in the same folders with the .flac files. I did read somewhere about an issue with this, but that might have been an older version of PA, or that the user didn't have all of the folders/files selected for scanning. I'll see what happens next time I purchase music on iTunes.