Give up some more info. What type of beer are you making? What's your calculated IBU? Porters, stouts and brown ales can easily accomodate brown sugar. Pale ales (to a degree), Saisons and IPAs/ IIPA can handle some cane sugar. I've even made a Blonde ale that used 1 lb honey. I would keep the sugar below 10% of your total grain bill if you decide to use any.
Life is too short to drink cheap beer.
I decided to stop drinking with creeps. I decided to drink only with friends. I've lost 30 pounds. -- Ernest Hemingway