I left a boom box on the boat last summer and the corrosive salt air had it corroded and ruined in that one summer. I have since bought a marine grade system but won't be installing it until this spring.
West Marine had the Dual unit on for $99.00 (internet special) around Christmas time so a went for it. I am now in the process of installation and decided to read through this thread first.I fell for the IPOD control thing. Avoid it. The best control for an ipod is an ipod, the user interface is intuitive and fast. I got a unit from Dual that controls the ipod, and its a complete waste of time. I can never find the song I want and I have to push and turn and push and jump through menus. Avoid the whole thing and plug your ipod in with a RCA jack cable or an ipod mini headphone plug adapter and be done with it.