Jim,

I tried a few times unsuccessfully to render your scene, but it kept hanging on the anti-alias pass. In any case, if I get it rendered I'll post it.

In the meantime, I did some judicious cropping and a simple level adjustment to one of your above images, and I think it works pretty well.

IMO, the woman standing should probably go, as she competes with the tree as the center of interest by looking out the window, and is a dead giveaway this is a computer rendering. Perhaps having her facing the tree with her back to the camera would be more appropriate. Also, an alpha plane with an outdoor scene would help outside the window as another photorealistic cue. Just my 2 cents.

Chipp