Diet and nutrition will be the two biggest factors in your overall success. If you're working an active job make sure you are fueling your body enough and make rest a priority. Start yourself on the right foot with these things and then consider adding a supplement or stack.
What are you looking to get from a supplement? IIRC, Growthfactor 9 was a test booster/GH product right? There are a few solid natural options out there for testosterone boosters that live up to the hype. I would read the writeup on Alphamax XT - very solid profile as a natural test booster, and it also contains an AI to control cortisol and estrogen. Alphamax also contains forskolin, which would be another great ingredient to help with your body composition goals.