If you are still struggling with the butter vs. margarine debate well you aren't alone. The margarine product has quite a history and has changed a great deal since it's creation. This is the best current information I have been able to find that may help you decide the best butter and margarine options for you. Trans fats and partially hydrogenated oils are bad so check the labels. Good luck!

http://www.health.com/health/gallery/0,,20509217,00.html