Hey JP - text Steve @ 260-417-9951 - he'll get back to you. Yes, it is a small family business, but growing faster than I think anyone ever expected!
Depending on how many you smoke for, on a regular basis, should determine the size. The #2 is great, and suits my needs very well. But, the depth of the #3 is very alluring, especially for full-size packer briskies and full racks of ribs!
You'll produce some of the best Q you've ever had with an SI, and your past experience will help with that! The difference is, you'll do it from the land of Lazy Q! 8)