There's no flies on the Vortex Vipers and I actually prefer them over the Vortex Razors, but they are what they are, and that's a $450.00 binocular. IMO, anyone who thinks they're getting a free lunch with "lesser quality" binoculars is dreaming.
Having said that, I also realize not everyone wants or needs $1,500.00 binos, so I'm glad to see some great options on the market. Another great choice in that price range is the Zen-Ray ED3. Vortex has the better warranty though.