Fantasy baseball roster question-catcher?

I have a very good lineup, especially in the infield, but I have a problem at the catcher position. they are Carlos Ruiz and J.r. Towles. With an infield of Mourneau , Utley, H. Ramirez and D. Wright. Outfield is a little weak but you can't have everything. They are P. Burrell, J. D. Drew and Chris Young. My question is, should I try to trade for a catcher or should I wait untill the season starts and see how things work out at the position. i feel that my lineup is strong enough to wait but am not sure. In case you are wondering, no I did not draft with a bunch of idiots, it was an automated draft on CBS. I guess the other managers felt the infield wasn't very important, so looking at it in that light they mat be a bunch of idiots. Anyway you opinion would be invited. Thank you.