LifeBlue also has Lithium batteries comparable to Battleborn and Trojan has just announced that they will be selling their Trillium brand of Lithiums.
Battleborn & Lifeblue have 10 year warranties so I wouldn't be too concerned about BMS problems. There are other companies that are producing similar batteries but info is scarce on them.
For the price (as of now) BB & LB are probably the best option until Trojan posts their price and warranty info.
Other manufacturers like Relion, Victron, Mastervolt are much more expensive. And to buy individual cells (which are all made in China) then add the cost of a BMS, etc. puts these close to BB & LB prices.
I'll probably be converting my Foretravel to 300 amp hours of Lithium sometime this winter so have been researching this and emailing BB & LB.