I was die hard vortex for the past two years. Started with diamondback than to the old razor. Very nice stuff, last year they went HD. The new stuff is way better glass, but razor is now at $1200. I looked through the viper hd and think the glass is clearer but the fov seems smaller.
Doing a lot of review searches it seems zen rays are top stuff in that price range and up to the higher mid range prices. I have even heard reviews that the ed3 will stand its own next to a razor hd!
Do some research and try and look through them to make sure they are good fir you.
zen ray ed3 and prime binos is a no fault warranty like vortex, supposedly the ed2 spotting scope will be changing to a no fault warranty in the near future....their older stuff as listed on their site is their old limited lifetime warranty