Thanks for the responses.
The Rumford fireplace is too intensive of a project for me right now. I'm looking more for plug and play with either a wood stove or an insert. The chimney has been inspected and the liner is in good shape, so no worries there.
I guess what I'm really getting at is: is one of these installations "better" than the other, in whatever terms you choose: efficiency, aesthetics, even heat, etc.... A couple of the insert models that I looked at do have blowers, and I'm more interested in the resilience of something that requires no power to run. We moved from an off-grid situation and were really in control of all of our systems and are trying to get back to a similar state in our new grid-tied place. So, electric blankets are really not what we're looking for Angelika.
Thanks!