Well, I tend to rebuild my store every 6 months or so. It's addicting.
I made the build in Blender and imported it with prim.builder. I then swapped some of the normal prims for megaprims. I am texturing it now, mostly with custom-made textures.
The last pic shows yesterday's situation, it has changed a bit since: the ceiling is now white, and I've textured the light path section (although that's going to change again, as I'm not happy with the shading).