DL, thinking about a move

12 team PPR dynasty, we only have to start one DL, I currently plan on starting KVB against CHI, but my backup guy is Everette Brown.  I was thinking about adding either a 3rd DE, or just swapping Brown for S.Ellis because I heard on NFL Network that the Ravens are having trouble at RT.  Do you think Ellis would be a good start over KVB this week?  I heard that DL's in a 3-4 aren't recommended in fantasy.

Start KVB. Cutler was getting absolutely pounded in the preseason and I don't see any reason why that trend wouldn't continue into the regular season. Mike Martz does a horrible job of protecting his QBs and I expect a big game from Kyle Vanden Bosch.

I've been browsing this forum for about a month, thank you very much for the fast response.  This is a great looking site with extremely valueable info on IDP, something that is rare at the moment, but future looks bright.