Hi Nylon rock and welcome to the forums
The GGJazz model is a limited run of nylon string guitars made with Monteray Cypress for the back and sides, this wood comes from the Golden Gate Park, San Francisco.
The A and S Jazz models are available in spruce top version (32).
We choose binding and purfling combinations to compliment the others woods of the guitar so it will vary some-what but if your wanting a custom model then we try to accomdate as close to requests as possible.
P.S. that ain't me holding the Jazz, that's a fantastic guitarist from Newcastle ... Paul Rose http://www.paulrose.co.uk/cgi-bin/page.cgi
.... awesome player