Okay, Younis is leading the way in the poll.
Right now the standings are:
1. Younis
2. Smith/Amla
3. Rahane.
My verdict on the batsmen:
1. Steve Smith:
Positives: He has probably the best record everywhere in the world (along with Amla) and is a prolific run scorer for Australia.
Negatives: He has been crticised by people for failing when the ball moves around or turns a lot where his unorthodox technique has come under scrutiny.
2. Kane Williamson:
Positives: Has a great technique, probably the best in the business and fantastic temperament.
Negatives: Has an average record in Asia particularly in India. Similarly in England as well. His technique against spin was found wanting against Ashwin in India.
3. Joe Root:
Arguably the best batsman in the world who can dominate attacks and has very good versatility.
Has a poor conversion rate, has to make more big scores outside of England. His form has been patchy by his lofty standards this season and will face an acid test in India.
4. Younis Khan:
One of the best spin players in the world and can beat any attack into submission in Asia. Clutch player who can pull out great knocks out of the blue.
He is inconsistent overseas. Played one of the great knocks at the Oval but struggled in the rest of the series otherwise. Was a similar case in South Africa.
5. Ajinkya Rahane:
Has played excellent knocks all over the world in every country he has played in a very short career. Has been in great form in the last year averaging 60+.
Was guilty of not putting up big scores and failing to dominate a series. Had a tendency of playing a great knock but otherwise having an average series until this year.
6. Virat Kohli:
Has been in great form ever since the Australian series averaging nearly 54 in the last 2 years. Can put any attack to the sword at his peak. Has a very good record almost everywhere except England.
Needs more consistency. Struggled to cope up with the lateral movement in England two years ago. Has a tendency of playing one shot too many sometimes.
7. Alastair Cook:
Arguably the best opener in the world. Has probably the best temperament in the world along with Amla. Can make mammoth scores and has one of the best records for a non asian player in asia.
Struggles a bit against quality fast bowling and had a largely forgettable series in Australia and South Africa.
8. Hashim Amla:
Has the best record in the world. A complete batsman who has a very good technique and temperament. Arguably the best batsman in the world in the last 3 or 4 years.
Has been struggling for form in the last one year or so averaging 41 in the last 12 months. Slightly susceptible against the short ball.
9. David Warner:
Can change any match in a session and can pummel attacks into submission. Has been in very good form as well.
Struggles against turn in Asia and there are some questions over his temperament.
10. Johnny Bairstow:
The most in form batsman in the world. Is excellent against pace ans swing bowling and in crunch situations. One of the great prospects for the future and is very consistent.
Struggled against Yasir in the UAE and has an average record in Asia. Will face a huge test in India in the upcoming tour.
11. Azhar Ali:
Has brilliant temperament. Is a very solid batsman who can dig in and play big knocks. Showed good skill in his century at Birmingham when the ball was moving a bit on the 2nd day.
Has a poor record outside asia which he will need to correct in his tours next to Australia and New Zealand.
Overall taking "current form" and their records everywhere into consideration, I think Joe Root, Younis Khan, Virat Kohli, Ajinkya Rahane, Johnny Bairstow are in contention while Smith and Williamson aren't far behind (both have had a bit of below par series in their last tour). It's very hard to pick one honestly and will probably become clear in the next 2-3 months.