I called support for Brother given all of the interest on the board about Brother's ability to import as a PDF. They can't. None of them can. Their explanation was that with paperport, you can easily convert it or it tends to come right it and be changed into a pdf. Leslie and others would have to fill me in.
Personally, I am a hardware PDF guy and not a software PDF guy. Yes, I have more software programs than I can count that do this to PDF and do that to PDF, but I really want my networked fax machine to Fax to PC in PDF. Ultimately, one should be able to choose between tiff and PDF, but PDF is basically the de facto standard. I have also heard on here that Brother MFCs tend to work better being connected directly to a computer via USB and somehow being shared from there. I think Brother is a good machine, and I even recommended it once -- it seems to work for a lot of users on here -- but I wouldn't recommend it anymore. I think at minimum, the fax machine has to PC to Fax, Fax to PC and be networkable all in PDF. AND, and this is key, the interface GUI for PC to Fax has to be intuitive unlike, say, Toshiba.