Welcome!
I personally have a 3D and my dad has a #2. Ive used both recently, and they both work well in regards to PID or analog. Had I cooked the same meat in both, I’m sure I wouldn’t be able to tell which one cooked what.
I like gadgets though so that’s why I went with the 3D. But, like other said, the analog works just as good and you can purchase a remote thermometer to help you watch temps. Something like the Fireboard. I have a Chef Alarm from Thermoworks that does not have WiFi or Bluetooth, but it gives me additional thermometers to use plus the PID one.
So, that’s one thing I would consider, perhaps you have one already from your stick burner? But either way, you will enjoy the set it and forget it smoker so you do get some time back.
I will say, the #3 size is really nice. I’ve had 2, 18lb packer briskets going at once and have done 8 full racks of ribs with no issues. I like the added length.
Enjoy whichever one you go with!