I also meant to mention regarding the internal plus exo cage thought: I feel pretty good about where I am at, even with just the exo.
If I do flop it, I think I addressed my two main concerns:
1) I will be able to walk away from it.
2) Unless it's a ridiculous roll, I should be able to get it back over and still be able to drive it. Hopefully any body damage will be kept to a minimum.