I'm pretty sure we'll go with Jumbo Coturnix quail which is the same variety Jack has.
We may try raising pheasant as well. I need to learn more about them.
As for rabbits, I had a New Zealand White as a pet many years ago, and he grew to be huge. That variety is a possibility as is the Champagne d'Argent. I will have to see what grows fast, provides good meat for smoking, and is available.
Prior to WWII, rabbit was eaten more than chicken in many parts of the world. What's great about rabbit is that the meat is practically all lean protein.
Are you considering going back into raising rabbits for meat?