Gore or someone else?

I've got Gore as my flex player tonight. I started Kevin Smith today and that didn't work out to good. My bench players are Ryan Matthews, Boldin, Torrey Smith, and Manningham. Should I sit Gore against Baltimore's Defense tonight? If so, who should I put in his spot. Also, I've got Maclin this weekend. If he doesn't play this weekend then the only WR that I have left to start would be Manningham. Should I go ahead and put someone else in Maclin's spot. If so, who should I put in his spot. I need a win this week or I may not make the playoffs. Any advice is appreciated.