Hey Dave,
I don't have a D17, but I've got a D15. Similar guitars, my understanding is the D17 has binding, where as my D15 does not.
It is an all hog guitar, back and sides I believe are laminated, with the back arched, and a solid mahogany top. I love mine, it's got a nice deep growl to it. A friend of mine describes it as a very masculine sound. To my ear it is radically different to a guitar with hog sides and back and a spruce top. I like them, it would take much to pry my D15 away from me. Only other thing I would say is it is quite possibly the heaviest wood and stringed instrument I've ever owned and is classified as a deadly weapon in some countries!
cheers
m