Went to a Battle Born 100AH two summers ago and have been very happy with the results. Ditched over 160lbs of AGMs that were too large to fit in the camper so had to stay in the bed of the truck. That required lots of long cable and made keeping them topped off near impossible. The Battle Born fit right inside the battery compartment of my Bigfoot camper and eliminated most of my charging problems.
I also added 200w of solar on the roof along with a solar charger with a LiFePo4 mode. On a sunny day I can run most of the electronics I want without a problem and still have my batter topped off for an evening of use. My experience has been in mostly sunny conditions so far so I can't speak to cloudy but I suspect I would be fine there as well.
The BMS has already saved me a couple of times when the camper was in storage. I really like not having to stress over the charge state of the battery knowing that my investment is going to be safe.
One thing about Battle Born is that if you are prior military, they (at the time I purchased) offered a military discount of I think 5 or 10 percent. Just call them when you order and inquire if they still offer it.
If you have a good set of AGMs that have years of use left on them, I wouldn't replace them but if you are in the need for a new set of batteries, LiFePo4 is worth the investment even if it comes to be twice as much initially. Long term you will be happy you pulled the trigger.
