Hi folks, I retrofitted an RNS-E into my A4 cab with Bose. It had the symphony i think before (6 cd internal changer). I am now getting fed up with just the sd cards for MP3 and want to add ipod so i can use my iphone4. What is the best solution bearing in mind it has the retrofit harness in now. Ideally i would like track info on the rns-e but if not ce la vie. Which dension would be best or some other solution? Sorry if this has been posted before and thanks for reading.