I will be picking up either a 24" iMac or a mac pro very soon. There are very obvious arguments for each of them and like many others I am agonizing over the choice. One thing I haven't heard much talk about is the audio capabilites of these computers. I understand that the 24" iMac has an updated amplifier but not having listened to one, I don't know how good/bad it is. Anyone wannabe audiophiles have an opinion on the audio quality of the onboard sound of these computers?