Another vote for Passporter.
I really don't care for the Unofficial Guide. I have found some terribly inaccurate info, the touring plans have never worked for us, and it seems very, very negative. We've seldom agreed on the dining reviews.
The Birnbaums book is good for first timers as it has a lot of photos to look at and get reference points from, but it doesn't have many tips and tricks (it tries, but they aren't very good). It is a great tool for overall info, but not for saving time and money. The Birnbaums Kids book is great for kids.
I used to love the Perlmutters books, but since the Passporter came out they've lost their luster for me.
Rita Aero's book is OK, but there are much better.
Fodors, Frommers, Dummies, Econoguide, etc. IMHO are all pretty worthless.
Anne