I am no NRA member, but I have been taking the GNC Sport Vitapak every morning, then Whey Protein after every workout. I have found that the cheap crap from teh Wall-Marks works every bit as good for me as the $90 a jar stuff...
I have not experimented with any Testosterone boosters, but if I need an energy/fat burning kick, I take a Yohimbe 451 daily for a week or two.