I'm in the market for a GPS and have found a lot of options, but I'm not sure which one to decide on. I've narrowed it down to Garmin since everyone I've spoken to personally says that's the manufacturer to stick with. If you use a GPS, what kind do you have and which features are really useful for riding? Do you have yours wired to your bike or do you run it on batteries? Is vibration an issue?

I noticed that Garmin makes a few models specifically for motorcycle use, but they're large touch screen units meant to be used with gloves. That's cool but I'm thinking I might opt for something smaller and less expensive like a hand held unit that can also be used for camping or trekking. Thoughts?