Looks very tasty. I love stouts. One suggestion. Try replacing black patent with Briess Midnight Wheat.
I have done this twice and have loved the results.
http://www.brewingwithbriess.com/Products/Dark_Roasted.htm#Midnight
Nothing wrong with black patent. I like it in moderation. Too much and you get an ashy taste though.
I have made a recipe with black patent and the same one subbed with Midnight Wheat. Both recipes I had roasted barely in. I felt that the one with midnight wheat was more complex. I think the black patent hid some stuff. With that great marries otter... it would be fun to see some of it shine through.
But... if you were to do the recipe as is, I think it would be a winner. IMHO
I have never used wlp007. I have used WLP002...they say they are similar. I though it was good.
For a lot of my stouts I use WLP004 it is great, but you have to watch the dactyl. I tend to ferment on the low side of the temperature range to make sure it doesn't go crazy.