I use Soundtrack Pro all the time to clean up various artifacts in tracks and have a fast workflow now. I'm just finishing a meditation cd and there are tons of weird mouth noises. Clicks and smacks within words that you just can't cut out normally. I highlight the chunk of audio in Logic and convert it to a new audio file. I then open that up (shift-w) in Soundtrack Pro and look at in spectrum edit mode. I can then ear and see where the little click noise is and highlight it and delete it. Since I'm usually only grabbing a portion of the frequency spectrum it's usually perfect. I then flatten the actions and do a save as, replacing the existing audio file in Logic. Logic updates and it's fixed. This has me curious about using Izotope's RX 2. At this point I don't do this enough to warrant spending more money but, if I did, I'd look into getting more of a built in plugin approach to save time.