Considering pulling the trigger on this thread:
I *really* like the Asian Ambulia, and it would give me a nice control to base my plant growth off of. If it's not doing well... then I'm really f--king something up. I also think the dwarf sag would be something to try for my little patch of grass. May not work, but can always pull it if need be.
I also could use some suggestions on a type of moss for the rocks!