I have casein myself before bed. The effectiveness of it is up for debate, but a shake before bed is a good idea regardless, casein or whey. Like everyones saying though, eat, eat, eat. As long as your working out you won't get fat. Did you end up grabbing some creatine? Go with the monohydrate, you can get straight creatine powder dirt cheap. The other ones are just as if less effective and they can go up to $80 bucks.
yea i got me Ancient Strenght and some Mono aswell.