Ok, as promised, here is my report. Only had the Nuvi 350 for a few days now and did a little navigating around town with it. Wow. This may be the solution you guys are looking for! I looked at the others and settled on this one, and I made the right choice!
It is way fast, finds itself really quick and refreshes as fast as you can make a turn. Voice directions are good, even has an exasperated female saying "recalculating..." when you make a wrong turn. The screen is bright and easy to read and automatically goes to night mode which is great!
Mounting is a snap, as the suction takes a good bite on either my shelf on the LT or the front edge of the oddments box lid. I know, I don't trust em either and will get a spare one to affix permanently to the shelf. I used a Sony cassette adapter to pipe in the voice, along with the pretty good Mp3 player included in it. I really like that feature. No need for XM with 8+ hours of music on a 1gb xd card. Audio book feature too, voice directions cut in nicely.
I don't know why anyone would want a brick size gps, when this one is the size of a pack of cigs and the screen size is about the same. Not waterproof, so I'll carry a baggie and a rubber band, or maybe some saran wrap. Can always go in the tank bag on battery if necessary too, or my pocket...
Only beef so far is the maps in the Reno area are a bit old, missing some major new streets and changes.
Best price found here: ElectronicsLeader.Com Great service, call him for your best price. Tell him the guy from NV sent you and maybe he will do a little better. Has all the others too.