I agree with Truman, use Apple Lossless. Alternatively WAV is the uncompressed version, and will take up almost twice the amount of space. Also, make sure to check the "Use Error Correction..." in the Preferences (Advanced>Importing).
On a related note; I recently heard the opinion that Apple Lossless may lose (interpolate) some of the timing information. Can anyone confirm or deny this? Regardless, I have not been able to hear much of a difference between Apple Lossless and WAV files of the same music. At times I thought I did, but always ended up questioning my own discernment upon further consideration. It certainly is a very close call, at least to my ears.
Marco
On a related note; I recently heard the opinion that Apple Lossless may lose (interpolate) some of the timing information. Can anyone confirm or deny this? Regardless, I have not been able to hear much of a difference between Apple Lossless and WAV files of the same music. At times I thought I did, but always ended up questioning my own discernment upon further consideration. It certainly is a very close call, at least to my ears.
Marco