You left one thing out: recommendations. Just barge in, in the Chatterbox and ask which module you should be using. Many people must have been already there at the point where you are now, so you can build on their experiences.
To follow up on bart's suggestion -- go check out the IRC channel for the modules competing for your attention.
I was interested in checking out lightweight web servers recently, and I found the lighttpd channel occupied by over a hundred users, while Cherokee had just half a dozen users. Having said that, the one user I chatted with in the Cherokee channel was friendly and quite knowledgeable.
That probably shouldn't be a deciding factor, but it's good to know, in case you need somewhere to go for support.