The pitfalls of bying Lithium batteries (article)

It is battery replacement time for me too, and I am looking at a compromise possibly going with Firefly Oasis Carbon Foam AGM, they get nearly the deep discharge capacity of Lithium in a lead acid AGM for about half the price of LiFePO4. So while they still have the weight of Lead Acid, they have nearly double the effective power with safe deep discharging.