Some people find bcaa's useful around workouts, some prefer EAA's , some people think these isolated aminos are bulldust and think all you need is your normal protein. You wont find a consistent answer as to what you should do, and as I said different people have preferences. Buy some and test them out around the time you workout, and see what you prefer. Within about an hour after you finish your workout follow with your normal protein. Or just eat normal food with protein in it after your workout.
In the end it won't make much of a difference which you choose so choose the one you enjoy and best on.
Here is an article with studies behind it.
Rodja also has some opinion on the usefulness of BCAAs for his and cutting, hopefully he will drop by.