iPod to high-end stereo system
I have a high-quality stereo system through which I listen to CDs, especially classical music. I have a CD changer connected to the stereo receiver, but the changer is at capacity, and I can't add another one unless I buy a new receiver and a new audio rack, which I can't afford. Therefore, I am thinking of using the iPod Classic to replace the CD changer. I have been told by an Apple store adviser that I can connect my new iPod through the standard iPod Dock to my receiver, with a basic mini cable and a mini-to-RCA adapter, and get sound quality as good as I now have from my CD changer, which is connected with stereo RCA cables. Is this true? If not, what is the best solution?
A related question: I have copied all my CDs into iTunes on my iMac in MP3 format at 192 kbps, which is certainly high enough quality for listening with my iMac's speakers, or listening on headphones from an iPod. But if I listen through my stereo system with my large high-quality speakers, do I need to have my music in iTunes at a higher bit rate or in a higher-quality format such as AAC or Apple Lossless to get the same sound quality I get from my CD changer? If I do need higher quality, I have been told that I do not have to re-import all my CDs, but can simply tell iTunes to convert the already-downloaded data to the new format. Again, is this true?
iMac, Mac OS X (10.4)