I was looking at the Garmin eMap and the Garmin V, which is an update to the GPSIII. The Garmin V is almost double the cost of the eMap, though.

Does the GPSIII+ fit in your hand well? I don't want something too bulky. Also, can't I hook up a plain old GPS to my Palm and get some software on the Palm that can do the turn-by-turn features? Then I wouldn't have to pay for those extra features on the GPS unit.