If you're looking for something dark and hoppy, then I have a few suggestions since this is a style of beer that I am just learning that I enjoy.
Stone Sublimely self righteous is an american strong ale, but basicaly its a malty, roasty IPA. There's a recipe here for it: http://www.homebrewtalk.com/f12/stone-xi-anniversary-clone-51521/#post517660
I haven't tried this recipe yet, but I'm looking to in the future.
You could also check out the Dogfish Head Indian Brown Ale. I don't usually like brown ales, but if they were more like then I could get into it. Has a lot of roasty character and a good hoppy aroma that I enjoy. There are a ton of clones for this beer around if you search.
Personally, I feel like if an IPA is dark, then it should have some roasted notes. I don't understand just making an IPA black just for the heck of it.