Captaincy is not all about taking your shirt off and pretending an injury when you see a green top pitch, making politics and look like a poor fielder and poor running between wickets.
Coming to Saurav, he may be a good leader, but he doesnt deserve a place in the test team for a long time. He is in the test team only because the team is winning on top of good performances by dravid ( averages 200% under saurav in test matches), Lakshman and Sachin and backed by bengali politicians. Nobody bothered about his batting because team was winning. Remember that he doesnt have a 50 for an extended period of 1 1 /2 years and every fast bowler wants to bounce him away and will dream of getting his wicket very cheaply.
IF the selectors are looking for an immediate change towards youngsters , dhoni should be given a chance. If the selectors wanted to give Dhoni some chance to settle down in test cricket, they should make either lakshman and Kumble the captian and give Dhoni Vice captaincy and gromme him for 1 year and Dhoni will be an automatic choice for the next Captain.
No matter who will be the captain in the team, we need to have a rotation policy and play with with 6 4 1 combination in the test matches and among 6 Batsman, 3 should be seniors among Dravid, Sachin, Saurav, Lakshman and 3 should be juniors ( Rohith Sharma,Jaffer,Dinesh Karthik,Yuvraj,Ghambhir,yousf Pathan ....etc). It doesnt matter even if these youngsters fails. You should stick to them. Bring Yuvraj i
