Swarovski 10x42 SLC, Zeiss 10x40 Victory, Steiner 10x42 Predator or Steiner 10x42 Rocky? I have found these four on the net priced at or between $729.69 (Steiner Predator) to $764.69 (the Swarovski's). The price is substantially the same, how the heck do you make an informed choice between them?