It's fantastic. lol @Heatsurge. Yea you get to see a lot of things you normally would miss. I just need a second 5850 so I can get 60-80fps XD.
But it is quite playable.
Phenom X4 2.5GHZ
2x2gb DDR1066mhz
WD 500gb 7200rpm (os/game)
XFX ATI Radeon 5850 XXX edition
I sit around 45fps avg.
2x AA I think everything else maxed out. The visual diff from 2 and 8x isnt that great, however over 2x AA isn't playable at my rez, CPU craps out.