In addition to what everyone else said, I think that the health of your hair is crucial pre product. I hope that makes since. If your hair is even slightly damaged, no matter how much product you use, it will remain somewhat dull and lifeless.
So, my suggestion would be to focus on healthy hair first and work with your texture not against it. Narrow your products down to what works for you. Sit back and watch the sheen, thickness, body, etc. come in. In the long run, you'll be more satisfied with your results.
HTH,
TsAngel