I'm going to buy one of these units soon. From what I've read, most people recommend getting some sort of dock connector to go from the ipod to the adapter; everyone says using the headphone jack rca cables hampers the sound quality, and you can't charge you're ipod at the same time.
If I just got the headphone rca cables, am I really going to notice the difference, or is it something only an audiophile would notice? Also, do you only need the ground loop isolator if you're connecting to charge it up, too?