Not sure what breweries get distributed out your way but off the top of my head:
Firestone Walker Velvet Merlin
Green Flash Double Stout
North Coast Old Rasputin
Oskar Blues Ten Fidy (not my fav, but others seem to like it)
Brooklyn Black Chocolate Stout
Kern River Class V
Deschutes The Abyss
Lagunitas Cappuccino Stout
Great Divide Yeti series
Mikkeller Beer Geek Brunch Weasel
Stone Russian Imperial Stout
3 Floyds Dark Lord
The Bruery Black Tuesday
Founders Breakfast Stout
Goose Island Bourbon County Stout