Which vendor wins the battle of the Help Authoring Tools?

With the recent releases of new Help Authoring Tool versions for RoboHelp, AuthorIT and Flare, plus the release of Quadralay's ePublisher 9.3, does this affect which Help Authoring Tool you should purchase?

What I find interesting is the different ways in which the tool vendors perceive the issue of creating user assistance. If you want to create great online Help, with paper being a secondary consideration, you will probably prefer RoboHelp or Flare. If you have a team of people writing, you will probably prefer AuthorIT or ePublisher. If you need to translate the content, then all four of these tools have strengths in their different ways. If you want to generate XML, then Flare, ePublisher or AuthorIT.

The best approach is probably to create a statement of requirements for your situation and then use this as a benchmark when considering each tool. Here are a few factors to consider:

The need to localise content.
How many writers will be involved.
Whether you are creating new content or re-using existing content.
If you need single or multimedia output.
Your view of users and the feedback they might provide.
How much content you might be able to re-use.