I originally ordered a Fusion IP600 (Ipod dock inside), but luckily it was DOA and easily returned. While I had it in hand I realized this model was some what limiting for my needs. As an iphone user, I would prefer to have access to the iphone screen to switch songs in Slacker Radio / Pandora apps. So Ill just use the AUX in of the CD500 model I found on closeout at west marine, gain CD capability, got it for 1/2 the price of the IP600.
Other BIG differences between the two Fusion units:
THe 500 series radios had 4 output zones each with pre and sub outputs.
The 600 series radios have 3 zones and pre amp out only for one zone. Smaller screen and no builtin crossovers.
This seems really odd that the company would move so far backward in capability on a new model. I only needed 3 zones, but the one set of pre outs was a deal breaker for me. The 500 series stuff has been discontinued so its really cheap (if you can find it).