I haven’t heard much about any of them, really. but, Celeste and Jesse Forever was co-written by Rashida Jones, so it’ll be interesting to see what she has to say as a writer.
Liberal Arts looks like it’ll be pretty stereotypical Sundance fodder (I don’t mean that as a good thing), but it does have Richard Jenkins in the cast and he is always good. also Elizabeth Olsen is shaping out to be a great actress.
The Words has Michael McKean and Jeremy Irons in supporting roles and they are always good.
you might not get another chance to see About The Pink Sky if it doesn’t get distribution in the states.
so I would say if you had to pick one of those four go with either the first one or the last one.