I have had great luck with AK47. It is a great producer and also has the taste and potency to go with it. Bag appeal is good also if that kind of thing is important to you. With the strain of AK47 I have I consistantly get close to 2 pounds per 1000 watt HPS. With Blueberry I was only getting a pound per 1000, so that shows you the difference a strain can make. Usually to get a large producing strain you have to sacrifice potency or some other traits. Thats what I like about AK47, it has it all. Like stated above, power plant is a good one and even northern lights. Big Bud is definitely a large producer and also chronic, but I have heard that lately the potency isn't as good as it use to be. Hope this helps a bit - good luck! TGT