I also am a newbie, but also a tech junkie as well. We use the Meridian Colour which we bought in the travellers pack. Came with the direct route cd, 64MB card and a cable that does double duty as the pc hookup and car power source. One downfall with the cable however is that its not USB. Hey does anyone know if you can get a gender changer for usb? I doubt it, its a different standard and pin out... Sorry, back to topic.... We have had no problems with it yet, except when the batteries are under a quarter. Then the readings sometimes seem off. When we switch the batteries however, the co-ords end up being bang on. Its water and shock proof, and unless I am wearing sunglasses I have never had problems reading the display.
The direct route software is awesome, it will plot your quickest route (keep in mind the software does not take into account speed limits in routing though). You can use it to find nearby resturants, amusements parks... almost anything really. By address or nearest location. Its like having a local search engine in your pocket.
With the memory card they gave us, the 64MB I have managed to upload about 90% of Ontario and used less than 40MB of space, I don't know if topo maps are larger byte wise than street maps though... so you may want to inquire about that.
But by and large, from one techno geek to another. The Meridian has been a solid purchase for us. We will deffinately purchase other magellan GPSr's in the future if ever we need or desire too.
Happy caching and good luck, its a great pastime
Apples 2 Apples