Very nice!
About the wood grain, it might make this thing really come alive, but on the other hand, if it's wooded, it would have been sealed and probably little or no grain would be visible. I do believe, like most wooden planes, there would be many variations in the surface from small warps and ripples to large dimples.
Also not too easy to get right. At any rate, based on your usually clean approach, I would keep any additional wood effects subtle and at a minimum.
About texture, yes, this would really look great with some variations in color and texture. But, again, your planes are clean and straight so this would be a different direction.
I think it's more a matter of your own personal taste.
