I somewhat feel RR re gonna smack DD big time, because of their lot of dependence on top 3 and mcgrath. You get through them, you r ripped apart (its not gonna be Karthick everytime). and something tells me CSK'll get past Mohali in a tense finish (reason being , Dhoni's ability to withstand pressure). Final can b anybody's game, though i feel RR would get past CSK on the basis of their sheer consistency and captain's shrewdness.
