it's a matter of taste. basically they will all give you the same gains. There's no miracle protein powder. I personally love Sports One and NHF cause of their taste and they mix easily. While others will go with Pro Lab, Weider.......
Biotest Low Carb Grow! is a great tasting and high quality product. They use a blend of slower digesting casein and the faster whey proteins. Good product. A little pricey but if you can afford it that would be my favorite.