Hmm, just read that thread.
I can indeed export to fbx with Rhino. Scaling (as mentioned in that thread) is not a problem as I can set measurements on my own as long as I know the output. And during the import to Unity, they can resize if necessary.
Interesting. While my models aren't nearly as detailed as the ones above, I'm more about doing Locales.
Well you did mentioned that you normally get someone else to do your textures?
Maybe you should work on your texture pipeline.
I don't know how it using Rhino, but I do know if I find my textures are blurry using Maya or 3ds Max I have to adjust my UV's in my 0 to 1 space in the UV Texture editor or I need to increase my MAP size so that it displays more resolution.
Also, you should look up making your own custom Materials or Shaders. I don't know that process for Rhino but I am sure you can figure it out.
Your lighting plays a part as well.
Hopefully my suggestions can help you out in getting your textures in the right direction.