to my knowledge most if not all protein powder will give you the protein farts.
if youre a member of 24 hour fitness, i would wait for the optimum nutrition 5lb protein to go on sale to around $50...to me thats a good deal.
if not, you can always find 5lb. ON protein on amazon for about $10 more ($60)....i recommend the cake batter flavor.
if youre a member at costco, the 5 lb. muscle pharm cookies n cream aint a bad deal...I think its about $45.