KC is my best D/ST, but I'm afraid of them throwing up a dud vs. a tough Oakland offense in a must-win situation for me (against a tough opponent, mind you). My other defenses are Pitt (vs. Buffalo) and the Jags (vs. Minny). We have huge rosters, so there's literally only 4 defenses on the wire, of which the best options are San Fran (vs. the Jets) or Indy (vs. Houston).
I'm leaning towards rolling with the Steelers as they've been hot lately and the Bills should be good to give up a few negative plays. The real issue for me is should I play my "stud" defense in the Chiefs tonight or pass on them and ponder my options for Sunday.