Rick, Rick, Rick!
Can't believe I missed this little two day flurry of wonderful activity here!
This tree is coming along very well. You are - fortunately or not, depending on your readiness - at the stage where you'll have to commit drastically to one direction of another to achieve whichever vision you pick.
The idea of the Bristle Cone styling intrigues me, as you might guess. It would certainly require you to go all out with deadwood work, and yet I know your mixed feelings and perhaps lack of experience in that sort of work. Unless you are both technically AND mentally comfortable with that sort of work, and prepared to risk this prized piece of bonsai real estate in something that is not yet in your comfort zone, it may not be the best way to go. But then again, as Winston Churchill said, "Play for more than you can afford to lose, and you will learn the game."
Interesting that Kimura, when first asked to come teach in the US, agreed to do it only on the condition that he be taken to see the Grand Canyon AND the Bristle Cone pines in the White Mountains! The book, Timberline Ancients, by David Muench and Darwin Lambert, once treasured by many of the old bonsai masters, is a marvelous tribute in words and photos to the Bristle Cones, and well worth owning if you can snag a used copy somewhere.
Great tree, Rick. It had come along nicely, and awaits the next phase, whatever that may be!