I too like coffee in an Imp Stout. I add 4oz of coarse beans in the fermenter. I usually do about 3 days before I rack. Usually a local dark roast. I'm moving my 17.5 gallons of my Imp Stout to secondary tomorrow. 5 gallons get Tawny Port soaked oak spiral. 5 gallons get Old Forester soaked spiral, and 2 gallons get bottled straight up. Going to secondary kegs for the first time. Guess I'll tie the oak and suspend it somehow.