Being new to the GPS world, I'd like to ask for some help please with respect to these units and cycles.
1 - What's the preferred way to power them? Directly to the battery,to a cigarette lighter connection, or just battery power as needed?
2 - What units / models allow you to do put in multiple destinations?
3 - The majority of trips that I am planning will involved taking off from a certain location and then, much later, getting back to that same spot. Can you input the start location without having to know the actual address and then later just target that same location easily? Is this what is meant by waypoints?
4 - For units that do voice navigation, how do you hear the directions while riding? I have a strange feeling that looking at the GPS while riding is not the wisest thing in the world so I am wondering how its actually used when riding
5 - Does it matter to get a GPS with a SiRFStarIII chipset for a motorcycle?
1 - Some GPS's do not have battery power, most do. For those that do you can usually connect a power line if you want. Batteries work on most units fine if you don't mind changing them.
2 - It sounds like you haven't used a GPS very much. You can buy a GPS that isn't full featured, heck you can buy a simple GPS that doesn't do routing of any sort. But most riders use fully featured GPS units that will allow you to get as crazy as you want with routing. The routing isn't perfect on any GPS but most units will do what you are asking.
3 - Yes and Yes.
4 - This is your question I like the most. Yes is the answer to your first question. If you have an audio connection, you would hear the directions in real time, as you approach the turns. That connection is often a bother on a motorcycle, but many riders have one. And it is not wierd to have a GPS to look at or listen to on a motorcycle after you get used to it. It's great.
5 - Chipset doesn't matter to me. Price, functions, software, speed, display size, mounting, battery life, portability, mapset, quality and a lot of other things matter but I don't care what chipset is used. I don't care on my TV, DVD player or computer either. Chipset has to be one of the least considered items on a GPS.
From the sound of it, you will love a GPS while riding. Probably more than most riders. Good luck.