James,
Here's my pitch for the #4, you can put a ton of meat on and have good spacing from the heat source, I cooked 9 racks of pork today almost 70 lbs and still had 15 inches or so from the bottom rack to the heat.... I love this thing. Had room for another 50 lbs if I needed it, didn't have to move or turn racks.... Cooked it perfect. Good luck.
Merry Christmas to all! 🌴🌲