[Gerry Zagorski]

Yep - I think Frank pretty much summed it up....

The only other thing you might want to concern yourself with is the communiucation interfaces on the 2 different units you are looking at..

Lots of boats and electronic manufactureres are using newtorking interfaces to allow their stuff to be networked together to work in concert with one and other... Your speed from your GPS shows up on your depth finder or depth shows up on you chart plotter etc... You can even interface camera in the salon or engine rooms to the screens of your other units... These all in one units are good for that sort of stuff since you buy them in a package and they all play together nicely...... If however you are using separate units for each and you want to interface them now or in the future you need to concern yourself with the interfaces a given unit supports or lack thereof... Not sure but I would think that the digital unit is more likely to have the interfaces you want now and into the future..

If however you are using separate units and not planning to network them you can likely save a few bucks and go for the ananlog unit..