Working with the Mental Ray Architectural Shaders in Maya to get a nice look before tackling the actual textures.  I might be doing this the wrong way around (Shaders before Textures) I'm not sure, but it feels like a good approach.  

As you can see...the lighting is starting to look pretty good, but very dark along the right hand side.  Will have to add in some more lights over there.  The next step is to finish up the texture maps, and push the Area Lights up into the Light Fixtures instead of just sitting on top of them.