I have done extensive listening tests on rippers, ripping specs and options and playback software comparing WAV vs. AIFF vs. FLAC......hours of testing....hours upon hours as I was convinced WAV or AIFF has to sound better since it has no compression. (techincally, they should ALL sound identical since they are bit perfect at the output, but I wanted to test it to make sure)
Reality: FLAC sounds no different than either WAV or AIFF. WAV is a pain in the a** to deal with as it does not hold tags, sounds no different and takes more space than FLAC. AIFF is like WAV but it can hold tags. Reality is there is no reason to use WAV or AIFF....if you Must use WAV or AIFF, use AIFF....it holds tags. But you should really just use FLAC.