I am completely new to dedicated motorcycle GPS. I did take a 1200 mile trip last year to Bar Harbor and back and used my Android phone connected by Bluetooth to my helmet headset. The phone gps was a somewhat satisfactory way to navigate but it did have some limitations. First, I was not familiar with the controls on the Parrot SK4000 controls. Second, screen on the phone was difficult to see, especially since I had it tucked into the map pocket of my tank bag. After I arrived in Bar Harbor I picked up a cell phone mount at a local bicycle shop in town and rigged up a mount to my handlebars. The screen visibility improved somewhat until I had to ride through some rain. Then I had to put a plastic bag over the phone which reduced the screen visibility. Then, after a few more trips with the phone as a gps the powerlet power cord broke. The mini usb jack pulled away from the cord. So now I am planning the same trip (to visit my son) and am considering purchasing a dedicated motorcycle gps. 1) It seems like Garmin is the most popular choice? Are there better brands? 2) Is the 350LM better than the 660LM? Seems like it costs more and does less. I've read many reviews on Amazon about both. Each model seems to have its own set of issues. 3) Is there a better headset available instead of the Parrot SK4000? The Parrot is glitchy. The volume control is odd, you cannot adjust volume until you are making the call, not before. If you separate the headset from the phone and loose the connectivity then you must restart the Google map route upon returning. 4) How are the gps wired to the bike? I see that powerlet makes power cords for the zumo 450 and zumo 550. Will those same cords work for the 350 or the 660? 5) If I have a Garmin Zumo paired to my headset can I pair my phone to the headset also? I appreciate any information that is available. Thank you.