I would rather have a hand-held GPS that can also do vehicle work. I do not know about the new Magellan, but vehicle units generally have large touch screens, which make them somewhat fragile. They also have built-in batteries, which mean that you cannot throw AA batteries in them. Vehicle units are also generally larger in order to accomodate that big screen.

My dream GPS is the Garmin 60csx and a pair of memory cards: one street and one topo. It is a bit pricey, though.