I'd be slightly interested in seeing any of those but I'd probably only go see Untitled or Splitting Image. The former because I feel like I'd actually like the protagonist and the latter because it just sounds hilarious. Dying For Sex is an interesting idea but I'd never bother to watch it as I imagine it'll only be a satisfying experience for me if the protagonist commits suicide or something akin to that and I'd only know that ahead of time if I'm spoiled and if I'm spoiled I lose any enthusiasm to watch it. I rarely watch movies as it is though so that's not saying much. To give a definitive answer, Splitting Image barely win for me out of the two.
