Gambhir's replacement - Batsman or Bowler?

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Would you prefer to put a batsman or a bowler in place of gambhir in the team for the 3rd test against Sri lanka? I would have gone for one more spinner in the team and get mait mishra a look in on the slow low bounce Brebourne Pitch. India is looking for an outright win to maintain the number one ranking in ICC test ranking. And fordoing that India has to be aggressive. An additional bowler would improve the chance of getting more wickets and getting 20 wickets should be the prime goal of the team at this juncture. With all batsmen hitting good form I dont think the captain should be worried about batting issues. Sehwag is batting well, Dravid is capable enough to open the innings if need be. Yuvraj can play one down and Sachin, laxman and Dhoni all have made good runs in the previous matches. with 6 batsmen in the team I do think India should go in with additional bowler. Zaheer and Sreesanth will handlethe pace attack which does not have much of a chance in Brebourne Pitch. So the load is going to be on the spinners. Amit mishra can add variety as both pragyan and Yuvraj and slow left arm bowlers and Amit with his right hand leg spinners can be a good change. What is your opinion?