TX, I when through a few years debating this very thought. For the longest time I was dead set on the Safe. But, the more and more I cooked for myself and others I wondered if I should get the Vault. Then I got a chance to start selling BBQ at my local butcher shop and that was when I said its only 1000.00 more for 4x more cooking space. On the safe you can get 4 brisket on the vault you can get 15 maybe even 20 depending on size of brisket. If you never cook for large groups hands down get the vault but, if you have a crystal ball and can see into your future and know you will never without a doubt cook for large masses get the safe. Quality is second to none. Super efficient. I love my Vault. If my house caught on fire its the third thing Id run in for. The first two being my daughter and wife. lol. You really only get one chance to spend that kind of money so make sure you get the one you want. good luck. Here is a video I just made.
[ame="https://www.youtube.com/watch?v=b2L-sTJK2IM"]10 BRISKETS AT IDAHO 1 - YouTube[/ame]