I think koshkin has.
I have a Delta Stryker 4.5-30x56. Absolutely love the scope. Can't say enough good things about it. Better reticle than anything Vortex has, better glass than anything under the Razor Gen 2 level, and all the features you'd expect - tool-less turret adjustment, zero stop, locking turrets, illumination, great FOV and mag range, fantastic reticle, etc. All at a price below the Razor. I don't personally see anything under $2k new that compares. Disclaimer - i have not seen the XTR3 in person but that would be the only potential candidate IMHO.
My "only", and I mean only, complaint is the lack of labels on the parallax adjustment. I'm pretty OCD and I like to spend a long time to get the parallax set just right and when I spin the dial on my scope, the numbers usually match the distance. But the Delta has a few under 100 and then goes 100 to 250 to infinity. Now it's got reasonably large FOV, so it's not hard to focus, but if you make me pick something they could easily improve on, that would be it. All in all, I could never justify spending more money to upgrade to something else, as much as I love this scope. I had jumped around scope to scope for years until I got it. I've played around with ATACR, Tangent Theta, Razors, Minox ZP5, etc., but there just isn't any reason for me to spend past what the Delta costs.
With all that being said, I have no idea if the 5-50 is similar to the 4.5-30, but I felt compelled to provide a review since nobody else had responded yet.