Best auto to go in my cabs for yield and potency?

Will be 6 plants in dwc with cfls 6500k and 2700k
24tall 16wide 9.5depth and other 36" high to speed up harvests
I think will be cramped so cant be to bushy at least to much i cant tie up and cause to much hassle

check out here http://original-ssc.com/ they have a pretty good list of autoflower and fast autoflower. they give info on them too... like height,yeild, time of grow ect.