Join Date: Dec 2007
Location: Portland, Oregon
I think the Nuvi 5x0 is overlooked because Garmin markets it as an auto unit, although they say it is 'motorcycle friendly.' I think it is a great lower cost option. Make sure you look at the total cost of ownership, including mounts and cables. The nice thing about the Zumo units is they come with enough to get them mounted and wired on most motorcycles. You'll need to buy the mount and cabling for the 500/550.
It's the only Nuvi unit that is waterproof/resistant, so you'll need to keep that in mind when comparing it to others.
Finally, if you join the AMA you get a pretty good discount direct from Garmin. My Zumo 660 was $640 from Garmin direct.
2009 R1200GS Adventure
2009 Wee ABS (for sale)