The season may look to have more to offer but right now we almost done with the first half of the season and any team at a top position and still but in as much effort in the next half of the season can have a very good turn out at the end of the season.
Well if I were to say who would be in the top six position at the end of the season I would say Arsenal at the first position just because I think they are solid and deserve it and then Manchester city, Liverpool and Aston villa then in six and fifth would be Newcastle and Tottenham.
I also think the 6 teams you mentioned will be in the top 6 of this year's table. It is certain that Arsenal, Liverpool and Manchester City will be in the top four of the points table. These three groups are very strong. On the other hand, Aston Villa team is in great form. This team is now at the third place in the points table. If this performance continues, Aston Villa are likely to qualify for the Champions League. Manchester United are now sixth in the points table. However, the performance of this team is very erratic. So Newcastle have a good chance of finishing sixth or fifth in the table.
Not really sure about Arsenal, because they fail too often at the last moment. But indeed, if only considering to finish as the top four then yes, of course Arsenal still have a chance to finish in the top four but to finish as a trophy winner, I'm not entirely sure. After all, from last season Arsenal were also quite projected to be title winners but in fact, Arsenal still failed despite the fact that last season Arsenal had a better chance than this moment.
Because yes, at this moment at least there are still Tottenham and also Aston Villa who were very impressive at the start of the season for Tottenham, while Aston Villa is still in its best trend at this moment. Therefore, the competition this season is certainly more difficult than last season and yes, with a very tight competition like this then I will doubt Arsenal to become title winners.