We have the Odyssey PC2150s, two banks of 3 each. The older bank -- which also services our electronics
suite -- is finishing it's 7th season, seems fine. I believe Sears Group 31 Platinum Plus batteries are the same product, so they're often available locally to save shipping
, and sometimes even on sale
You might look at Lifeline, as well.
Both Odyssey and Lifeline say they're built to MilSpec. FWIW.
Depending on your total amperage requirements, the 60-amp charger
would probably be a useful upgrade... especially since it's easy enough to do during the build stage. I think ABYC recommendations suggest a charger capable of not less than 10% of your total available battery
amperage... and any extra amperage is generally useful for running DC house stuff, anyway. We have an older ProMariner ProTech 1240 (40-amp) charger and it keeps up... but I usually feel like the always-on (when we're aboard) AIS
transmitter is stressing the limits of what a 40-amp charger is capable of... so plan on upgrading whenevrr I get a round tuit.