The return yardage throws a bit of a wrench into the works, but...without knowing how your scoring works for return yardage...gotta believe that a strong PPR WR is better than a KR/PR only player.
I would consider any of those listed as a better than choice over Chad Johnson.
In order:
Nelson
Decker
Ginn Jr
Danario
LaFell
Just not a Cribbs fan. Way too sporadic for my taste. Ginn has looked exceptional, so willing to give him the nod.
my 2 pennies