Roadtrek Zion Battery help

[Goozer]

Hi all.

I’m new to the forum. Hoping you fine folks can help give me some guidance on my 2018 Roadtrek Zion.

My house battery (12 V AGM) appears to be on its way out and I’m looking into replacement options. My local dealers haven't been much help.

Does anyone have any recommendations? Have there been any advances in battery tech in the last 5-6 years that I should consider (lithium, etc) or do I need to replace “like for like”?

Any help is appreciated.