My neighbor recently had their car window broken because a thief was hot to get at their GPS unit. Are you planning on leaving your PB in the car much?
I just received a floor mount unit from Arkon. I use to have a similar one for my 9700 until the car was broke it. Easy to install. Only issue I see is that the back plate isn't wide enough so the power button is covered by the left mounting arm and the right one is close to the volume control. Spoke with them today and they have a larger back plate coming in about a month.