Hi Laura,
Since you are well aware of the temp swings in the #3, I am pretty confident that you will love the #3 and may even appreciate its simplicity.
I love my #3 and have no intentions of upgrading to a #3D, but if I ever did I would probably get a #3D so I would have one of each just like you. I have contemplated getting a #3D and keeping that at home and taking the #3 out to the lake. That still may happen someday when I have some extra dough.