George, I understand where you are coming from as I traveled the same road not too long ago. The main difference is I am not using an Apple product to use as a server. I now use a NAS and run through window machines (several) running JRiver on them all.
After first ripping in a compressed flac I ended up re-ripping in a non-compressed flac files as space was not an issue when I went to the NAS. This option is not available to you (flac) with the powerbook. Whatever format you end up ripping to just make sure it is uncompressed as any can be convered later if necessary. It will be easier than re-ripping as I ended up doing...
After first ripping in a compressed flac I ended up re-ripping in a non-compressed flac files as space was not an issue when I went to the NAS. This option is not available to you (flac) with the powerbook. Whatever format you end up ripping to just make sure it is uncompressed as any can be convered later if necessary. It will be easier than re-ripping as I ended up doing...