Sorry mate you took me wrong just telling that we are not lucky to own high-end components which is sad.But as you know i am working in IT so sometime have chance to test high-end models to see where are they now.To be honest am fine with middle segment cause you still can playing all games with almost all on high settings for double less money.
ATI 5850 is great card no doubt but there is something about people usually not talk,but i have experience with PC components almost 7 years
Trying suggest Vert to not make wrong turn with that video card if other components especially PSU is weak to proper run whole machine.
Sorry again if you misunderstood my suggestion