I have the Fury 5000 HDs and really like them. The Leicas will have better glass, but the Vortexes are still really good. They just aren't alpha glass good. That said, I don't think it would make any discernible difference for my glassing needs to move up to alpha glass. I can see well enough through the Vortexes before it is legal shooting light or after legal shooting light where I hunt in Texas that getting an extra 3 minutes isn't going to make a shot for me. I would say that the Fury 5000 HDs are probably the best value to performance of all the range-finding binos out there.
