I went through AOPA for both financing and insurance. The insurance they provided me was very reasonable, about half what I pay for my car, without having a PPL yet. The only advantage to the AOPA financing on the other hand is the paperwork will be done right because they deal with airplanes all the time. You may have mixed results with your average banks. They will have a complete title and modification search done as well and will take care of all the FAA documents, as would any good airplane financing business.
Matt,
I tried the AOPA financing route. They laughed at me, well BofA laughed at me. Seems that because I'm self employed, I'm "un-employed". Whatever! It took longer, but I have the cash.
As for the AOPA insurance, I'll look into it. I have a call in, but haven't gotten a call back.