I have the 23 qt and my Dad has the 16. I've used both. Personally, I think the larger capacity is worth it for sure. If nothing else, I can pressure 1/2 gal jars in the 23 qt. Nice to have around from time to time. It is a bit taller, but certainly not enormous compared to the 16. Not going to make a big difference when in storage. And since it takes a little time to run a batch from heat up to cool down, the more jars you can cram in there the better. More than likely, you'll get the first one and wish you had two.