I started endless sinking into terrain with uGrids at 9, I really don't know how you can manage 11, although you're tempting me to give 9 another try!

Your grass load distance will thank you, people can set that grass load distance in the prefs file to whatever they think will be awesome but unless the grid they're part of is loading as well you ain't gonna see it, alot of the little things like that operate that way too.

Edit:
To All:
Anyone find some way to definitively know or better yet in-game see what say a 100K distance is? I mean I know 4K is roughly the distance between the top of the Dragonreach stairs to the tree...but 100K is a little harder to kind of 'eyeball' like that Anyone know how big a Cell is for instance? I could work with that. I'm just looking for more solid reasons to set things to whatever value and this would go a long way. Like with those three blockdistance settings, what is 250K vs 500K distance wise? If I'm setting it to something bigger then the entire map well what the hell is the point of that? Know what I mean?