For RB I like Matthews. While I think Murray is normally a better start, he has a brutal matchup and the Steelers are playing for their playoff lives, which only adds to the chances that they shut down Murray.
For WR, I think they're both very talented WRs who can put up decent numbers so I don't think you can really go wrong either way. If I had to choose, I'd lean towards Garcon as Cobb has a tough matchup against a very good Bears D. RG3 clearly has established Garcon as his favorite target and he should see plenty of looks throughout the day. That's not to say that Cobb won't, but I like Garcon's chances simply due to a better matchup. Good luck. viewtopic.php?f=19&t=531915