I thought about it but wanted to keep it stock......for now. Also, I don't even own and Ipod ... and I still convert the music I want to CD's, I'm also planning on purchasing an FM mp3/4 transmitter for the car which I can then just run any digital music through the existing unit, so stock can more than satisfy my needs.

I've narrowed down my transmitter search and will be getting that soon. It's a plug and play and the reviews are really quite good on it and I can take it and use it in other cars too, as well as rentals on trips.