Suggestions for 12 x 12 room

Hi... and thanks in advance for your help.

I have a 12 x 12 room in a house that is self contained.

I am just completing my first grow using a waterfarm 8 drip system with add-on circulation kit, growing in using hydroton.

I want to max out the room for my next grow and want to plan it out now (as I am in 2nd week of flowering) and want suggestions from this forum on what system will give me the maximum possible yield (for my size room)

I have no problem giving the Waterfarm to a friend... and going to a different system (in fact, I would prefer to not have water "sitting' in buckets for a week at a time (even with the circulation system), so I have been thinking the ebb and flow would be a better choice as it would put the water in one place and give me more control.. (but then again, that is why I am here, asking for advice as I don't know ;-)

More info, I have 2-400 and 2-1000 bulbs (sharing 2 hoods) and am figuring to buy more as needed (maybe even larger hoods for better coverage)..

The room is self contained with ducts in and out and water. It also has a nice size closed (about 8' long x 30" deep)...

So... what do you think? What is the max results I can get out of this room and what system will it take to get there?

Thx again
DC