Yep, tried all three, and looked at at least one mode that someone else is developing to see if it had better indentation. I don't remember the names of the three indenters being all that distinguishing, so I had to keep notes in my .emacs just to tell them apart.

One good indenter (maybe with options to select how to style your code) would be better than three. I remember reading a blog post about how hard it is to indent Haskell automatically. It breaks my chain of thought though to have something automatic that works only most of the time. It means I routinely have to stop to fiddle with the editor to make it indent correctly.