I look at the wide units and think they missed the boat entirely. When I am using my nuvi 350, I keep wishing the screen was taller so I could see farther up the road. So what do they do? make the screen wider

I suppose so I can see places I won't be driving by.
Go to the Garmin site, you can compare multiple models. Also check out C/NET.com review
Garmin nuvi 260W Widescreen GPS Receiver Car GPS (Navigation) reviews - CNET Reviews