just my 2 cents...if you can afford to never use a bag seed then don't. If you know what strain you got it makes thing more predictable . If u screw things up with grade A u might get grade B. If u screw up with grade B u might not like grade C . you are going to put a lot of time and effort into this so the cost of good genetics for your weed is very small indeed..

plus a bag seed has a so much higher possibility of being a strain that likes to hermie and even a good grower can get screwed by that.

good luck