http://www.umces.edu/vessel/

I asked the electrical subcontractors what kind of starting and house
batteries they intended to put in. They said, "AGM".

I said, "For the safety?"

They said, "No, for the performance. The safety is just the icing on the
cake."

This outfit does a lot of marine installation but their core business is
mission critical applications such as unattended communications switching
stations and hospital backup power. They are Canadian so they do stuff
that has to work in very harsh climate conditions. I've been very
impressed with their work and knowledge. They made a good case that the
wet cell has gone the way of the carburators for car engines. Maybe fun
to have if you like to tinker but, if you just want to go somewhere
reliably and efficiently, the modern technology is better.

--
Roger Long

If you go AGM make sure you have a charger that is made for them...
otherwise they have a very short life.

Also, thanks to Solar energy, be prepared for a huge hike in battery prices
compared to the last time you bought them....(especially flooded trojans...)