Have berrian, should i drop him...please help?

Im a Vikings fan and I have never liked Barrian! I recently picked up Gaffney and I think im gonna play him tomorrow. The problem is if Gaffney has a big week everyones gonna go for him. I dont fore see Barrian being a consistent reciever throughout the year....however he will have a few big games. If i was you i would drop Mike Williams and pick up Gaffney.