I'm deciding which one to get. I'm leaning heavily towards the 7850 for various reasons (newer, less heat, less power, 2gb, ect.). Someone convince me (or don't) why I should get the 480? Besides the fact that it's generally better.
P.S. I do plan on overclocking the 7850 as much as possible with the MSI Twin Frozr version.
The 7850 is an Overclocking beast. It can reach speeds upwards of 1050MHz core. Up to 1200MHz (vs 860 stock) with a slight voltage bump. Combined with the latest drivers and I'd say the Radeon 7850 is much better than the 480.