I recently read that you pass about 50% of whey because it it released so fast and you're body cant absorb it that quickly. Casein is supposed to be good because it is more slowly released and you're body can absorb it better. I've always liked muscle milk, go to 7-11 grab a nice tall cookies and cream. Evolution looks pretty convincing if anyones herd of/tried it, 10 g of bcaa's . Labrada Prov60 was pretty decent too, casein and whey.
Edit: For those of you interested, the new Muscle&fitness has a great article in it on casein and whey on pg.186