I have Felipe L�pez and Freddy S�nchez on my fantasy baseball team and looking to better my team...?

Do you guys agree I would be better off with Shin-Soo Choo or Marlon Byrd and drop S�nchez for Jos� L�pez? The reason I have kept L�pez is because he plays 4 positions but figure I should cut him before the playoffs but do it late enough to where the other teams can't tell how good my team really is til the very end and I hope they won't be able to make a move to adjust.