I think you're getting pretty close on this! Depth of field for wide outdoor scenes is debateable. There's more to it than just turning it on. Turning on your soft shadows for your sunlight (unless you're using a distance light) would be cool. Also GI if you're machine will take it is another next step. The modeling and texturing gels and is great and I think you've cranked hard on it! -Kix

-Kix