Help, best fast autoflower?

Hey... I know this is quite hopeful but can anybody recommend any good 8 week autoflower strains?
I only have 8 weeks to harvest, I need a fast reliable auto.
I havee read some good things about big bang auto and green-o-matic but also some quite bad things.

Forgot to mention.. set up will be 2.4x1.2, 2x600w mh/hps, 2x6inch outake,1x5inch intake, coco coir with canna coco a+b and boost.