All this talk about GPS really makes me want to get one. I've nailed it down to the Magellan Sportrak Pro or the Sportrak Topo. The main difference is that the topo comes with some topo maps in the basemap and also come with the CD. Anybody have experience with either of these? Is the topo software worth it? I want to know as much as I can about the topo software, so anybody who owns it can you please tell me about it? The GPS tracks your path automatically, right? Does it really float? Any info is appreciated. Thanks in advance.