I don't know if any final decisions have been made, but here's my .02. A friend of mine has a BT GPS he has used with various pdaphones and I have a Garmin 2610 stand alone. We took a trip and put both side to side to compare them. It was a toss up. Both gave pretty good routing and directions. There were differences, but the maps came from different companies so that could be expected.

Even with that result, I still prefer the stand alone GPS and one that is not integrated in the car (sure, they look cleaner but you can't take them from car to car). When I'm traveling, I use my pdaphone as a phone, looking things up on the internet (like interstate cams), or playing music through the stereo. There is only so much we can ask these things to do at the same time - how would you like it if you were close to your destination and you had to soft reset the device and find you missed your turn? Plus, don't forget about memory. If you take a trip more than a state away, you may not have the memory available to have all the mapping and point of interest data available the whole way (which can be very important if you need to go around an accident up ahead or need to find a business or rest area real fast).

I really like Garmin. Their devices work really well and they stand behind them with frequent updates providing mroe functionality and fixing any issues that they find out about.

My vote is the stand alone GPS. Aside from what I've mentioned above, if you need to loan it to somoene (spouse, friend going on a trip, etc) you can do so and keep your pdaphone.

Update: OK, so I re-read what some people have written here and feel the need to say more. I can only speak for the Garmins, not the Magellans. I've found that for softare updates, Garmin has provided up to about 4/yr on the operating system. The maps are updated annually and cost about $75 each retail. Everything is updated through a PC with a USB connection. If you have a media reader (my unit uses a compact flash), you can use that to update the maps. It's a piece of cake and you are using software that serves one purpose and it does it very well.

__________________
It's working for me, there must not be anything wrong!