Well I tried ProPresenter. For displaying purposes it will work OK. I don't like its "Presentation" interface - we move around a song list alot and having to find a song quickly is a must. Once you are in a song, the slide based view is OK.
What I really disliked is how new songs are entered. I tried several methods including the recommended method (from renewed vision) for importing songs from Song Select (copy to clipboard, use New Song from Clipboard). The result was a slide created for each line of the song. Most of the time I want a "slide" per Verse or Chorus - not a slide for each line. So, a song that was normally 4 or 5 slides ended up being 28 slides. I do not have the time or patience to do this much "editing" when I can easily download songs into MediaShout or SongShowPlus with little to no changes or extra time. Unless their is a better way (I asked this at the enewed vision Propresenter forum - which only has a couple of entries in it and no response so far)?
This may be somewhat a personal preference - but is high on my list due to the "time" element.