I'm with them three guys above me. I much prefer plain, but if I had to choose between the three examples, it would be the border.
If somebody told me that I had to make a gun/holster combo look snazzy, I would look to a plain holster and putting fancy (but practical) grips on the pistol. I think that has better eye appeal, and if I decide I don't want to be fancy anymore, I can easily swap grips. Once the holster is stamped, you're done.