I get to be the odd man out. I do all the travel planning, and wouldnt have this dilemma, BUT I would say wait, only because my DH can be stubborn as well. Better to keep him happy than save a couple of bucks.
(Besides, in my case, it is his cash we are traveling on

)
The issue will be dropped if you are right, but it you book it, and could have saved money, will you hear the end of it?
Also- does DELTA refund the difference in future credit? awesome... did not know that.... thought it was just JetBlue and SW.