Need to pick up players!!

[allegajj]

I am in a 6 team standard scoring league. My team has been underperforming. My team is:
QB: Stafford
WR: Fitz
WR: Bryant
WR: Julio
RB: Foster
RB: Spiller
TE: Pettigrew ( I just dropped Finley for him)
K: Tucker
DST: Ravens
BENCH: Mathews
BENCH: Sproles
BENCH: Jennings

The top 5 players at every position are as follows:
QB: RG3, Vick, Cassel, Bradford, Palmer
WR: Amendola, LaFell, Ogletree, Floyd, Stevie Johnson
RB: Andre Brown, McGahee, Ridley, Morris, Kevin Smith
TE: Bennett, Rosario, Celek, Chandler, Pitta
K:Tynes, Hanson, Waish, Bryant, Gostkowski
DST: Green Bay, Cleveland, Giants, Seattle, New England

Tell me what you think...should I make some changes through FA or try trading? Or should I just stay put?