Re: Ordering a new card tomorrow...
I would go with the 470. I have had both and I think the 470 is just 'smoother'. Plus, the other nice thing that everything just works out of the box. With the Ati card I needed to use ATi Tray Tools for an easy way to do profiles, and D3DOverride to force Vsync on.
Trust me, I love Radeon cards...but I am sticking with the 470 for now.
Intel Core i7 860 @3.85GHz w/ Corsair H50
4Gb A-DATA DDR3 1600
EVGA GeForce GTX 470 Superclocked 1280MB GDDR5
SoundBlaster X-Fi XtremeMusic
Windows 7 64-Bit