I like Xtend. At 205 lbs., I take about 20-30gm per workout. I know Greg recommends MRM but the Xtend is cheaper. I wonder how the quality compares though since it seems that the MRM mix has just as many fans a Xtend. I really like Scivation/Primaforce's products being that they have great prices and, to me, quality products. I use their ZMA exclusively.
Know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God's. 1 Corinthians 6:19-20
I beseech you therefore,brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. Romans 12:1