My A. Gates for his M. Colston, I have J. Finely to replace A. Gates and I just lost J. Jones for the season. I have R. Randle and T. Williams to replace J. Jones right now. My Other Wideouts include D. Thomas and H. Nicks.

With Colston's season falling apart, will I get better production from Colston than from one of Randle or Williams? Is this trade worth making or can I do Better? What kind of return can I expect for Gates, or Finely for that matter, in the form of a WR, that is, who should I target if not Colston? Can I do Better than Randle/Williams with those chips?
First year fantasy football manager...so any advice helps...

Team (2 QB non-ppr league with standard yahoo scoring)

Q:M. Stafford
Q2:P. Rivers
WR. Thomas
WR:H. Nicks
WR:T. Williams
RB: D. Murray
RB: D. Martin
TE: A. Gates
K:M. Prater
DEF:Cincinnati

IR: S. Vereen

Bench: J. Locker, Z. Stacy, L. Miller, R. Randle, J. Fauria or S. Bradford (depending on outcome of waiver claim)