What's considered to be the "best" grass mod available? I want good looking grass and more diverse grass.

You can check out diverse grasses, but I prefer RPGBlackDragon's LowTriPoly grass. Google it, if you're interested.

Diverse Grasses mods - http://www.tesnexus.com/downloads/search.php?name=Diverse%20Grass&scid=20&author=&mname=&desc=&size1=&size2=&downloads1=&downloads2=&udate1_day=&udate1_month=&udate1_year=&udate2_day=&udate2_month=&udate2_year=&ldate1_day=&ldate1_month=&ldate1_year=&ldate2_day=&ldate2_month=&ldate2_year=&endorsemants=&images=&readme=&advltonly=&page=1&orderby=name&order=ASC

lol...i came in thinking it was about something else ....