Please do not go to Yank Sing. It may at one point have been the spot, but its watered down tourist bullshit now. Ton. Kiang.
I haven't been to Yank Sing in a while now but I remember their shanghai dumplings being much juicier and flavorful than other Dim Sum houses in SF. What do you mean by "watered down"?
Coi Palace is a great all around Chinese Restaurant - one of my favorite places. I didn't even know they had Dim Sum. Will have to check it out.