What are some good tryptophan and b-complex brands?

I've been researching tryptophan, vitamin b, and 5-htp so I can increase serotonin levels. I've learrned that all these things basically act as a nutural antidepressant. I stumbled upon swanson health products and they sell all the natural vitamins pretty cheap compared to other places. I was wondering if they are any good, and if anyone can recommend other proven brands of 5-htp, tryptophan, b-complex vitamins?