Should i do this trade?

Sitting at 5-0 you certainly have some wiggle room to make a bold move, and looking at your team I'd definately do it. With Jennings, Engram, and White to hold you over till Boldin gets back you easily have to have one of the best WR corps in your league. And With Gore, Turner, and Johnson you really have no need for Williams. Holt is getting old and with all the issues St. Louis has there is really no guarentee that Bulger will even have time to drop back and p it to him, so I think you easily get hte best of this trade. White has become a top receiver with Matt Ryan helming the QB position in Atlanta and I don't expect that to stop any time soon. With Jennings, Boldin (when healthy), and White you have three number one receivers. Do the trade and never look back!