I'll soon be in the market for a new 18'- 20' saltwater boat and need some advice. This boat will be set up and used for fishing but also used at times for ferrying to/ from a small island. It will be in the water basically year round. I am leaning towards aluminum mostly because it is easier to maintain and will last indefinitely if maintained well. I have two specific questions:
1- What extra measures are necessary to effectively prevent electrolysis and dissimilar metal corrosion?
2- What manufacturers would you suggest looking at based on the quality of their product and how it would pass the test of time in the weather and the salt?
Many manufacturers out ther build great hulls. Many of those though "skimp" on the details and use cheap snaps, latches, bolts/ screws, lights, cleats, hinges, windshield wipers, bilge pumps, etc. I don't want to have to completely re-rig a new boat to bring it up to standards.

I'd appreciate any input you can provide.

Thanks