I have the Garmin Nuvi 200, it's the least expensive, but it still gets the job done. If anything, I would recommend a Garmin over any of the others. My father-in-law has the Magellan and my Garmin found places that the Magellan did not. Just this past weekend we were camping and I used it to find a local smoke shop and then we tried his but it came back with 0 results. The only drawback to my Garmin is how long it takes to "acquire satelites" maybe a min or 2 at most, but it's annoying.
Anyway, Let us know what you decide.