I was never quite pleased with CGI-Grass and the results of Grass-Tutorials, because IMHO the grass was too even and the grass blades too simple, so I went ahead and tried something on my own (rendered with Cycles, GPU).
It’s still a long way to go, more variations of grass blades and textures, more tweaking of the shader, colors and light, more tweaking of the hair-/particle-system options and so on …
A “closeup”:
I don’t know if I will ever really finish this, but comments, suggestions and criticism are nonetheless welcome.