I'm not sure if I like the idea of a single symmetric pylon, aerodynamically, as it would probably set up a vortex street behind it. With two pylons at opposite non-zero angles of attack relative to the vertical plane, you should have more control over how the vortices from them will evolve.
[EDIT] With further thought, perhaps the wake of the single pylon does not matter too much, given it will be so small anyway, but it still seems a waste of the potential to do more with the two pylons in terms of vortex control.