Buy one, buy one now!!
I replaced a 6950 xfire setup with a 7970 and let me tell you it is MUCH faster and MUCH smoother. Not to mention running MUCH cooler, and using MUCH less energy and using about 3 Watt when the pc is idle.
I can also get a whopping 325Mhz overclock from the core, stock is 925 and it will go up to 1250, but i run 1200 stock 24/7. Memory produces similar results. Its a beast.
The best part was i got it on offer from ocuk for £299 (which works out to about 470ish dollars?) plus four free games. The games were kinda crappy Deux Ex, two copies of dirt showdown and Nexuiz or something but its better than a knee in the groin and ive had a few of those.
A little bit of eye candy