Spider...the Garmin 76CSX is another one that will "go anywhere"...love mine, and have mounts for both bikes, and the car....plus a little case for it that will attach to your belt and hold extra rechargable batteries, so if you're walking around somewhere it's easy to take with you. It also works at any altitude 'cause it's the "outdoor" version...not specific to cars. I know this because a freind of mine has one and we were at 13K feet in Colorado standing on the Continental Divide...it showed the altitude correctly. It has removable memory chips up to 512 MB each, so even if one of the chips won't hold all the maps you need for a trip, you just load another chip (they're about 50 bucks) with the additional maps/routes, and change chips when you change locale. Takes about 2 minutes. I've got a 256MB chip, and got just about the whole Southeast on the one chip. Of course, if you load California, there's so many streets, it takes a lot of memory. Plus you can load a chip with Topos, another with lakes, etc. Vibration is not a problem because there's no hard drive involved. I got the best prices at GPSonsale.com and no complaints with their service.