I've been using Sound Studio mainly to dub MiniDisc off-air recordings to AIFF files and thence into iTunes. Occasionally I record from streamed content by using a cable between the audio output and input ports on my PB. I find Sound Studio pretty easy to use, and edits are simple to achieve. I've noted good reviews of Audio Hijack Pro -- does this have any benefits over Sound Studio? What are the real differences between the two packages?