I've done scrog,before! It has it's advantages as well as disadvantages.I'd say the 1000 watter is the 1 to go with if you put alot of effort in the venting of the hood.It would greatly increase the yeild! I have a 1000 watter! It's just too much for my space!But,next grow? It's the one I'll use with a light rail. My area is larger than yours.I just chose the 2 400's,because of the size fan or fans I would have to use.They would have to run continuous.Now they are only on for a total of 6 out of 12 hours with a timer to come on every 30 mins.

Ga Grown