I have UG and Birnbaum's.
UG is the best Disney guide by far.
Someone gave me a copy of Birnbaum's. It tells you a little about the park, and has maps, but is USELESS as far as how to tour the parks.
Birnbaum's all has to be approved by Disney before publication, so they can't offer any strong opinions about food, rooms, touring the parks, etc.
Look at the actual amount of written info and actual research in UG vs Birnbaum's. NO comparison.
Passporter is more of a planning tool. I would get the UG in addition to the passporter if I were buying the passporter. Your trip costs enough that the price of two guide books is no big deal.
I also have TGM, and I would only suggest that as an adjunct to the UG. TGM can be confusing. The layout of UG makes it much easier for planning, and you can take it with you. There are some good suggestions that are not in the UG for things like parade viewing, but I would start with the big UG. If you think it's too big to take to the park, get Mini Mickey too.
So I would start with UG. Get the passporter if the organizer part of it appeals to you. Then I would get Mini Mickey if you want something smaller to take to the parks.
If you actually read and absorb the information in the UG, then get TGM if you want some additional tips.
If at that point you still really need some color pictures and a coupon for a pin, then spend the money for Birnbaum's.