Can you request to have POIs (i.e. restuarants) show up on the map of the F-series so you can just "see" what is around the corner, etc?

Does it use the brand trademarks (i.e. the arches for McDonalds)?

What about the Z3 or the 8120?? Do they?

The F series nor the 8120(garmin) use corporate icons, just regular generic icons for POI. You should be able to overlay any kind of POI on any of these units on to the map.

Z3 uses corporate logos, but not that many. It also has different logos for different types of food