SOG strain suggestions/advice

With the outdoor season coming to a close its time to move back indoor. This October i plan on starting my first SOG grow under a 450w hps. I only plan on purchasing feminized seeds and i can only fit 8 plants at this time. I only plan on purchasing two strains and have a list of four strains I am debating on currently:

GH King's Kush
GH Trainwreck
GH K-train
DP Master Kush
Paradise Whiteberry

I am focusing on yield and potency, if you have grown these strains please lend an opinion, or if you have grown any other good sog strains plz reply!

I haven't grown any of those, but NL is a great SOG strain.

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Endless Sky - Dr Greenthumb: 6 weeks flower; 500 g/m2 SOG; very potent indica stone.

http://www.drgreenthumb.com/cannabis...dsEntrance.htm

http://www.seedbankupdate.com/su.html

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MrJoshC said:

I haven't grown any of those, but NL is a great SOG strain.

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Thanks for the quick reply,
ive heard NL is a good sog strain, but there are so many different NL's andthe majority arent feminized. any suggestions as far as seed co? i hear NL#5 is great..