I am trying to find a nice mobile MP3 player to use in my car. My current head unit does not support mp3's but i dont want to get rid of it even though I could buy a new one for the cost of the mp3 player. I want something with at least 10 gigs of storage and a large display so I can read it easily. The only model I found that is close is the the Rio Karma (~$350). The only drawback is that my headunit aux input is RCAs. All the players I have found only have a 1/8" stereo jack. If I use adapters will it kill the sound quality? The Karma does have RCA outputs but they are on the unit's cradle. Could I mount the cradle in the car? Thanks.