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Hey, I just bought the Garmin Nuvi 650 and I really like the bright display and good contrasting colors on control buttons/icons. It has a thin case that allows more versatility in mounting. When you start it up it has really quick satellite reception. The MP3 and picture viewer features although the picture viewer takes a lot of button pushing to see a large number of pictures.
It has such great hardware/software quality and stability I haven’t had a chance to use the allegedly great customer support (although I haven’t needed it yet, that was a serious factor when I decided to buy the garmin nuvi 650 gps).