As my off-brand POSK disintegrated, my wife bought me our 23KK.
I didn't put up much of a fight. She was tickled to talk with Dennis; people should consider putting uncertain spouses on the phone with him. I wish I had his charm.
I wouldn't go bigger, doing it over again myself. I've fed 80 people out of my 23KK. Two zones? My KK is my oven, used most often for bread, pizza, Focaccia di Recco, roast or tandoor chicken, and monumental smoked meats. My Solo Stove Ranger is my grill. Sometimes I'll be smoking pork for carnitas in the 23KK, at the same time that I'm grilling vegetables for salsa on the Solo Stove.
I have a Weber kettle we haven't touched in years. Kettles are a fundamental design, brilliant for their day, but one can now do much better. I now associated kettles with the taste of burned chicken fat, guests in someone else's yard. Worst case they make me do the grilling on a mismanaged fire, like a pitcher left out to take one for the team.
I can set a fire in my Solo Stove in a couple of minutes: wood chunks, lump charcoal partway up, a splash of 99% isopropyl alcohol, throw in a match, then come back in 30 or 40 minutes to a perfect fire. The vertical, smokeless column of hot air combines all the hype of air fryers with traditional grilling over fire. I get much more uniform cooks than I've even seen anyone get with close-to-the-fire grilling, and better flavor.
Mine is a Frankenstein rig (a Breeo Outpost adjustable grill grafted onto a Harbor Freight service cart) but Solo Stove has caught on to cooking on their fire pits, and offers some interesting options if one spelunks their site. They recommend wood as a fuel, concerned that a full load of charcoal could get too hot, but one never needs a full load. I layer wood then charcoal, as wood lights faster but charcoal lasts longer.
There's a long KK Solo Stove thread. It starts out slow as we experiment, but has more information.