Hi Boone, I have a #2 as well and I have very pleased with it. I am typically smoking for just my wife and kids, although I often end up sending the extras to neighbors. So, #2 fits my needs (always have left overs). I smoke 3-4 racks of BB ribs at a time with no problem, or two 5# chickens side by side, or a 8# boston butt on a rack. I can also fit a 12# turkey, or several times I have done half chickens on multiple racks. The point is, for me, the #2 produces more than enough smoked meat for my needs.
However, as is often pointed out here, you can always smoke less in a larger unit but not more in smaller unit. If you need to smoke more meat at a time than what I have described above, then you might want to go with the #3.