It would appear that 12v versus 6v could be as contentious as Diesel versus Gas or Ford versus Chevy (or that other brand...).
I'm also looking at the LiFePo batteries but with the new Giga-factories coming online in the next couple of years I think it's too early to buy unless money just isn't a problem.
Additionally though, I would really like to see a fuel cell system to replace the nearly unused generator. A propane powered fuel cell would dramatically increase efficiency and coupled with a decent sized LiFePo battery with inverter will cover most of your needs quite nicely. I hope that the industry will shift there though I expect it will be another 5 to 10 years before it becomes common enough. The only thing this setup likely could not handle is the AC but honestly it's not very efficient to run the AC on the generator anyway.