I posted this in the "holy grail" thread, but it seems appropriate here as well. For me, it would be a mid-90's 912 or 912c with Engelmann... to really go nuts Brazilian back and sides, although I don't know if they made them with BRW. I've really grown into a rosewood guy and love the GC/OM body size.
That said, a friend has a Taylor 12 string that sounds like a hundred beautiful guitars playing at once. I am not sure of the model, but it's got amazing tone.