First off: What is it
for?
Unless you are doing competitive target shooting, or that weird equipment contest that is Bench-Rest ...... then all these GearHead Uberspendy scopes are just guilding the lilly......
Koz, I think you might be better served investing in trigger time with an inexpensive rifle and scope than spending a huge amount of money on equipment your inexperience will not allow you to appreciate. I don't have the skills to justify hunting with $1K piece of glass atop my $400 rifle.... I don't think the animals would be any deader if my scope said Swarovski, Nightforce, or Leupold, ...... and I don't shoot far enough to need the Palomar Observatory atop the gun, either..... my dinky 3x9x
32 
Simmons Deerfield on my .270 WIN will get me to 400 yards with all the bullets in a 10" circle. That scope has been on there since at least the early 90's, and works year in, year out. They are available on e-bay for as little as 25 bucks.
"It is a rare marksman that can shoot up to his equipment."- Jeff Cooper
I think the answer to "What's the best scope?" is the same as the answer to "What's the best rifle?"
The answer is: the one you have! Master that, and then move up to something pricier.