Panasonic JO1 by Andy, on Flickr
Mystery solved. That's definitely a 1.5 DIN unit.
I'm not an audiophile by any means, but I like being able to listen to something at times, particularly on long trips. As Hunter S. Thompson once said: "I am convinced that with the right song on the radio, a car can go about fifty miles further before it runs out of gas." And I like my podcasts, too. But I also do a lot of traveling by car, and having a USB port in the head unit for an additional carrying port is very helpful.
The surround and my new JVC should be here over the next couple of days. I'll post the results and my impressions when it's in.