BCAAs are only 3 aminos: leucine (the one most important to protein synthesis), valine, and isoleucine. This is off the top of my head, so you may have to double check. I dont feel like checking.
Theyre really not necesary at all, but if you want to take them just for that minute difference they may make, id take them pre/during/post workout. 5-10 each serving. The place in my sig has them for cheaper than anywhere im aware of as well.