Beautiful, scary stuff, Ben.
I'm just now learning to incorporate Photoshop into my own digital work (beyond simply adjusting levels), and I can already relate to what you mean. I actually find that Photoshop is better for me in terms of underpainting and building textures, and Painter is where my thick-over-thin/oils-approach comes into play. You seem to have a greater handle on the approach though. Hope to see plenty more updates from you in the near future.