I own both, and had the Vortex first. The ELs are so much better even my wife said "wow" when she first looked through them. I'm not artistic enough to explain and it would be wrong to call the Vortex bad because they're actually very good, but when you look through the ELs you'll understand.
Sufficient weight capacity for the job and fluid adjustment. Underbuy on either of those two things and you'll be getting your wallet out again soon. Ask me how I know :)
I use Fury 5000s at PRS matches. The glass is more than adequate for that purpose, and if not for the existence of top end stuff like Swaro etc to compare to, we'd be calling this Vortex glass awesome. Rangefinding is as quick and accurate as my Leica 2400 RF, which I am very pleased with.
I agree with the majority who say choose Leica. I have compared various cheap-ish rangefinders ($300-600 range) with known-range targets at PRS matches and getting consistent reads on targets it easier with Leica than equivalent Sig or Leupolds I've tried.
I agree with an above poster that with Vortex a lot of what you are paying for is the bulletproof warranty. But that's not necessarily a bad thing. I own three Vortex Razor riflescopes, two pairs of Vortex binos, and a Viper spotting scope. None have ever needed warranty and I don't baby...
$1k should get a gently used set of Swaro SLCs on eBay. Lifetime warranty and reasonable refurbishment cost (should you ever need it) is hard to beat.
Alternatively, although there is a difference in glass quality for sure between Vortex and the top brands, it is rarely meaningful to me in...
I fully agree that while it is possible to hold 10x binos stable without support, it is so much more enjoyable to bring 8x binos on a hike where I'll be mostly freehanding them.
I use the EL 10x42 with rangefinder and it works great, but for situations where I need to bring different primary glass (really long distance can be tough with 10x), I wish I had a separate rangefinder.