I'm not very good at formulating recipes, but it sounds like you're making a stout with that bill. You could throw everything in and put in 30-35 IBU's of your favorite bittering hop @ 60 minutes, flavoring addition optional. Personally, I'd consider acquiring some chocolate malt, as well, and cutting back some on the black malt which I find easily overpowers if not used in the proper ratio.
I agree with BeeGee, cut back on the Black malt to avoid a burnt flavor. You could stick with the stout direction this is heading in or shoot for a porter with some crystal malt.
Drinkin' one of my first batches as I write this and I love it. I live in a town Kenilworth. All 29 years of my life. I would like to move to a place with more land but with the nearest beach 1.5 hours away and the city 45 minutes away I may never go. Plus I have 2 HBS one 20 minutes away and the other 45 mins away it's a paradise.
You never know untill you try. I cleaned everything out of my fridge in sep. I used 9oz. black 6oz roasted and a lot of other grains and all extra hops. turned out to be 1 great beer that I really enjoy. Had 1 tonight after I got home from work. Good luck.