I would absolutely do this in a heartbeat!!!
You give up a top RB (#1 overall in most cases) and get a top back (#2-#4 in most cases) plus a top WR (Top 10) so.....heck yeah you need to do this now!
I would also try and get Waune instead first and if that's a no go then I would take the deal that's on the table!!!
Good Job and Good luck!
Standard H2H 12 Team 1 Pt PPR, Start 1QB, 2RB, 2WR, 1 FLEX (RB/WR/TE), 1TE, 1K, 1 DEF