Are there any features that you know your users will expect? My methodology for finding a presentation framework was to try to make it in one, and once I ran into something that seemed too hard to do in my current framework, I moved onto another one. I did this until I got far enough using ioslides that it was easier to learn the hacky CSS necessary than to change frameworks yet again.
I think that I gave up on reveal.js when I couldn't find a reasonably straightforward way to create a two-column slide. That said, considering that I fought the two-column support in ioslides through much of my presentation, I'm not sure that it was a significant improvement in the end.
Main point: if you know your users will have one or two "must-have" features, figure out which frameworks support those natively (and well), and that will probably make your list much shorter.