Prashant is the best candidate for the Indian Idol title.
why? because
1. he has his original and unique voice, just like Udit jee and with a superb quality of entertaining the listener with pleasant feeling
2. he has been singing technically almost perfect in different genres without having any systematic knowledge of music and trainings that already has amazed the whole India and the world
3. he has all qualities to be an Indian Idol, not only as a very good singer but also as a role model for all the youths, as a self built personality in a poor's hut, as a struggling fighter, kind hearted, helping, brave, generous, easy going guy.
4. he has proved himself as an UNCUT DIAMOND, that is far far better than a POLISHED STEEL.
Amit is the luckiest one in top 4.
why? because
1) he got selected once being out from the leage in the wild card round
2) he made couple of blunders forgeting lyrics of the songs which sounded quite awkward but Jantha never punished him for such a miserable mistake.
3) even his performance is bad, he is garlanded with Judges' appreciation, for example, when he sang Mayeri, he basically ruined the real taste of song (you can verify hearing the original one and his record side by side) but still all four judges applauded him
4) he has made a lot of below-average performance but he has not been bashed in online forums as much as Ankita and Prashant. If my count, Ankita has 3 bad performance, Prashant has 2 bad performance, Amit has 3 bad performance and Emon has 2 bad performance. But the least criticized person is Amit.
5) he does not have any stamped allegation like other Top 4s have, Ankita is called besuri, Prashant - vote hunter, Emon - Sonu's copycat, but Amit does not have such a criticizing label.
6) Every Top 4s have their own fan, but if they are allowed to have 2nd choice, then Amit is loved by fans of Ankita, Prashant and Emon as well.