Having a good strain to start with is important, but there are alot of other factors that can be more important to the potency of your mj. I would pick a strain that grows well in whatever enviornment you have. Also if you are looking to grow really good shit, you will want to be able to grow some female plants in total isolation from your seeded plants. If you can't do that, your product will likely be mids no mater what the strain.