About to buy an AGM battery bank. Anything new or economical I should consider?

[monogram]

These are AGM batteries??

No, they are not.

What is the benefit for AGM when compare with GC?

https://www.samsclub.com/sams/duracell-golf-car-battery-group-size-gc2/prod3590228.ip

[littleharbor]

Check out Sam Club that has 6V 215A GC2 for $85

These are AGM batteries??

[monogram]

Check out Sam Club that has 6V 215A GC2 for $85

[Withalligators]

The best deal for quality I can find is 220AH 6V Crown AGMs for 227. 4 of those will put me right at 900. Any better ideas? Sprinter build, 981w of PV.
Cheers,
Alex