If I had this decision, I would roll with Britt this week.
Williams is very inconsistent lately. It seems that other teams are trying to take him away...and succeeding. Two of the last three weeks have been eggs. His ceiling is also pretty low. His best game was 99 yards and a TD, if I remember correctly. He used to average 60-75 yards and catch a TD every other week. He would get you at least 6 points. He has scared me off lately, and he is on my bench this week. I would not trust him in this important week if you have similar options, which you do.
Holmes has two things going against him. Playing PIT on the road is a tough test for anyone. He might know the PIT secondary better than most WRs, but I still don't like his chances. Sanchez is playing horribly lately. I can't give Holmes the nod this week.
That leaves Britt. The #1 receiver on a running team that has recently struggled to score points, against the 32nd ranked pass defense that allowed Derrick Mason to score twice.
Good Luck. viewtopic.php?f=19&t=488591