Nobody needs to purchase a flight sim based on my opinion, or Dion's opinion, or anyone else's here.
Try them all, pick the one you're happy with.
Might as well close down the threads while we are at it. People ask questions, they get answers. Also you can't try any of them other then a couple hardly-functioning demos.
Polls say a lot of things no matter what you think. Just because you don't agree with the outcome of the poll doesn't mean the results aren't accurate.
Physics in flight is an actual science, it's not based on opinions.