New Grower strain advice needed 20 week 3 strain grow

[gr33n_giant]

Hi All, 1st off happy new year to all!
i am changing from photo to auto after a recent close encounter with the 5-0 :drool:
i am looking at doing a 20 week, 3 strain grow. vegging in a ds60 under 250 hps then into dr90 under aircooled 600 dual spec.
going to double tier (homage to fd) bottom pot is 6.5l square, looking at 3X3 with roughly 6-8 cm distance rim to rim. tower fan in corner.
i need advice on strains, i am after
1, uniform height between 20-30 inches
2, minimal side growth as they will have roughly 20 cm room around
3, max 10 weeks seed to harvest as i want to start the second batch at 5weeks then third at 10.
i have grown HBD and couldnt get the beggars over 16 inches!
thanks for looking and happy growing
GG

 

[SmashedByHashish]

welcome to afn!!! you've come to the rite place!

i would suggest cobra or auto assassin:smokebuds:

 

[gr33n_giant]

Thanks, was here 2 years ago but got distracted into photo's and account has gone ;-( but back again;-).
doing dry run with old seeds most 18 months + kept in cupboard, so far have 2 creme caramel, a fast bud 2 and a russian rocket fuel and waiting on 2 onyx if they dont show it will 3 dead out of 7 as a fast bud didnt pop, if they do 1 out of 7 isnt bad, mary jane is such a hardy lady!
thanks for suggestions
GG

edit
got these from cannabis cup winners site, highlife cup 2012
1st White Label from Sensi Seeds for Super Skunk Auto
2nd Paradise Seeds for Pandora
3rd Royal Queen Seeds for Royal Haze Auto
anyone smoked or grown them?
cheers
GG