I have the ASD-1R Denon IPod dock. It's OK. The only problem I have is scrolling through the songs/artists. It takes forever. You can't say type in "T" and go to the artists that start with "T". You have to start at A and keep pressing the button through all the artists until you get to "T". Granted, I just got it a couple of weeks ago and haven't had much time to play with it so there may be some shortcuts that I'm not aware of.
I do think it sounds better that just having it hooked up to the 3808 with the headphone jack and RCAs.