THe WW is a sativa/Indica mix and the White Rhino is a straight Indica...Correct?

I think I'm going to go with the Grapefruit and either the widow or rhino for the first grow. Now I have to straighten out my hydro system.

Considering that my flower space is 5 x4 x4 do you think it would be more practicle to space the plants one per sq ft and force flowering early in a SOG method or fewer plants and allow them to grow? I would like a high yield but don't want to sacrifice quality. I figure if I use less plants I could go with a DWC system but are not sure what works best for a SOG.

I saw some pics of dutch grow rooms using a sog method. A large bed of soil and hundreds of plants...beautiful. If I only had the space!!