Durban Poison is an Indoor/Outdoor strain and produces 180-200gr Indoor.
Usually would say to go for Haze or Original Haze both designed to produce 200g's+ Indoor.....but im not
Im deffinately going to say go for the Haze 19 x Skunk (High Times Cannabis Cup Winner 1992) Its also 100% pure sativa, only difference with this strain is it is crossed with skunk for a bigger yield and a soft and shorter flowering period, and having a yield expectancy of 325-350g's Indoor. Ithink theres a big difference there in yield...and by the looks of it...thats what you are going for so this one would be the way to go.....but another benefit adding to this plant is the "Very unique sweetness to it."
Here bellow is a list also for you to inquire about the Haze 19 x Skunk about half way down the page...but there's also other strains like your Durban Poison so you can see the difference for yourself.....Happy tokes and Good Luck.
Bliss.

List: http://www.1stmarijuanagrowerspage.c...ana-seeds.html