I'm in the market for a good gps, and with all the choices and prices, which one is right? I only want it for the bike, so need a good mounting bracket as well. Most seem to come with a 12v cable for the car, and I did see on here where someone bought from Radio Shack, or a store like it, a 12v adapter cable with a battery tender cable connector on the other end. Great way to connect to your battery. No big rush, just trying to get some ideas.