The question is: use marine
grade or home grade on your boat.
Personally I feel that most marine
grade products are over priced for what you get.
If you can afford it, go with it. It will probably last longer.
But for household appliences like microwaves, toatsters, coffee makers and the like, go household, NOT 12 volt. You might have to replace them a bit more often, but the savings will pay for itself. Assuming you can even get a "marine version" of that.
When it comes to computers
, I believe that since I update them every few years, that a ruggedized version is not worth the extra money
. Take the panasonic toughbooks for example. They cost 4x or more what a average laptop
costs. Its not needed. Get a Pelican laptop
case and keep it in there when not being use with some dessicant. Especially when taking it ashore.
The cost is just not justifiable for many of us on a budget
If you got the money
, go for it.