The Maverick is probably your best and most economical choice. It will give you the box temp and an additional probe for monitoring IT when you have multiple cuts of meat smoking. Do you 'need' to have an additional probe to monitor box temp? Maybe for initial peace of mind to verify the Auber is doing it's job but other than that, I would say it is a personal preference. Entirely up to you. I have had my 3D since FEB and have yet to throw in another probe to check box temp. 1: I am lazy and 2: the smoker works fine and food is done within established cooking times. If there comes a time when I question the Auber, then I will check with an additional probe.