Just got an email that Fourneau is closing down, and is having a sale on their Grande Bread oven. It is basically a cast iron dutch oven, though it has a stone base, and the cast iron enclosure sits on it , you preheat it in the oven, then open a hatch, add a loaf, and then water, if you desire, close the hatch, and bake https://www.fourneauoven.com/collections/bakeware/products/fourneau-grande I had the original model which was smaller and had a cast iron bottom - got it used pretty cheap, and it worked well, though the size was a bit limiting. Sold it and bought the Grande. I think the size of the Grande is in the same neighborhood as the Challenger Pan ( though have not checked the measurements). The big plus over a dutch oven or combo cooker, IMO, is that the entire thing stays in the oven the whole time, so you are not worried about burning your hands when you load a loaf or removing it. The downside is that I didn't like the aluminum tray with the silicone pad for loading a loaf - I just didn't like the texture of the bottom of the loafwhen it baked resting on the silicone, so I just used a wooden peel to load. If you were looking at a Challenger, this might be something to consider, though it is a bit pricey.