I had a few rifles out today and compared my 44, my 50 as well as a couple of Vortex scopes. I said it to my shooting partner this morning as well - the Zeiss is an outstanding scope. I would not be surprised if I replace my relatively new Vortexes with Zeiss as funds become available. It's not that the Vortexes are bad, it's just that the Zeiss is that good.
My x50 is a "refurbished" unit from Cameraland and has had Zero issues so I would not hesitate to buy one again.
PS - back in 2008 I thought I was spending all the money you should ever spend on a scope when I bought a Leupold VX-II. It's still a great scope but I've learned so much about optics since then. When I bought my first Zeiss - the refurb from CameralandNY - it was painful to spend almost twice as much. Now I count pennies until I can save up for the next one.
I bought a rifle recently partially because it had another Zeiss on it and the overall package price was too good to pass up (buy rifle, get $600 scope free). And, I would not say the the Swarovskis my partner shoots are worth 2-3x as much as what I spent on my Zeisses.