Will Prowse recently posted a favorable review of the $399 100Ah 12V "Zooms" LiFePO4 Battery. In the teardown, he determines that it's identical to the $509 Chins battery he'd previously and favorably reviewed. Neither, however, has low-temperature charge protection, which he notes as something that can be added. Here are links to both reviews:
I have no personal experience with either battery, this is FYI only. I only wish I hadn't installed two 110AH AGMs in my van a few months ago. I could probably have gotten by with one of these.