best plant for my room space and setup ?

well i just done my first crop and was please but know i would like to know the best type of plant to grow in my space and what cutting methods i should use and how high should i grow them as i on grew last lot to waist hight ?????

space :7-8 feet high till touching cooltube
:2 feet wide
:1 and a half foot deep

my equip : 400w hps cooltube
: s&p 250 inline extraction fan
connected to coolyube
:homeade air intake with3inch fan
: 2x fluro lights that emit blue
spectrum light

i have all nutes pots temp sensors etc

any info on what seeds and what style of cutting in this space would be great cheers

I would do ak 47 or some white widow in that space.Plants wont get too tall but will yeild impressive

i can let them go rite up to 5-6 foot or is there no point growing them that high ?

You can let it get that height to get big colas.Since your room is 2x1 you really cant grow much plants if you are gonna have them that high.I would thorw 2 plants in there and do proper pruning so i can get some long colas.

sounds interest, Im sure it will all work out. you aare on the right path