Been a big fan of AGM for a long time now but looks like lithium is the next go to version. Will personally see how my experience goes in the next couple of years and decide from there:
"Is lithium worth it over AGM?
In fact, given the major benefits of choosing a lithium battery over an AGM alternative, you should consider upgrading to a lithium battery when the time comes to replace your AGM battery. Key takeaway: In the case of AGM vs lithium batteries, lithium batteries win when it comes to charging time and efficiency!"