In my fantasy leagues championship game,who should i start and who do i bench?

first off,i started 2 - 6 and am now in my leagues championship game(chea chea)...i am dropping quinton ganther for jerome harrison who is playing the raiders and dropping the texans defense for chris"beanie"wells who is playing the rams,both had great games last week,and both are playing bad teams who are among the worst in the NFL when it comes to rush defense....i started ganther this past week but didnt need his points for the win...now we can start 2 QB's with 1 in the flex and i have aaron rodgers who will be starting,but im not sure about david garrard in my flex option....would i be better off putting harrison or wells in the 2nd RB slot and the other in the flex where i would have put garrard,or shud i leave him in and make a decision between harrison and wells???