Waterlaz, The xxxHolic, I looked on Wiki for that and it seems like something the girls would like. they are into all that wizards and fantasy stuff.
Do you have a suggestion as to where to start or which ones are better than others?
I think you should just follow the plot starting with season1 (xxxHolic) and then season2 (xxxHolic:Kei).
There are 2 things I would like to point here though:
1) I don't know if the English dub is good or not. I've watched it subtitled.
2) At least wikipedia states that this is seinen. Which means that this one is a male oriented anime.
I would say that it's pretty neitral. Well. I've never understood them with their classifications.

Of the other ones you listed, are any of them something you think my girls might like?
There's the other one I didn't mention:
The Girl Who Leapt Through Time
And I think this would be just right. I think you should start with this one.

As for the others you could and probably should also try Azumanga Daioh.