This new Radeon HD 7970 will do very well with gaming, especially in high-resolution (2560×1600) where it beats NVIDIA’s single GPU offering often, although not always. Still, on average, the 7970 now the fastest single GPU system on the market, and to beat it, one would have to turn to dual-GPU solutions like the GeForce GTX 590 or AMD’s own 6990. Although I currently use a dual-GPU setup, I have to admit that they tend to be bigger and nosier, and I have always preferred a single-GPU system.
In terms of pricing, the Radeon HD 7970 is not cheap and I expect it to cost $550, which is fairly competitive with NVIDIA’s GTX 580. Cards are not available as we speak, so you’ll have to be a bit more patient.