There are no good Skyfall reps that I'm aware of at least. Current models have incorrect case backs among other issues.
Of the two choices, get a gen Omega. In fact, if you don't currently have a gen Omega or Rolex or comparable, I suggest getting one and when you get a nice rep, you will truly understand how good these rep builders are, despite how much all of us [censored] and complain about minute tells.
My first nice gen was a circa '97 Omega SMP Chrono.