I have several 7850 they can get a max of 403 and have 5 running in one board. All 5 get 380-385. . I have 2 7870's too. Those cards were hard to get configured. I spent a lot of time messing with them and can get 360 max out of them. I have 2 7970's also they get 660 max
I'd love to know your settings for the 7850, as those will be some of my first purchases. I think as of right now, my numbers lean towards the 7850 and 7950 ben the best investments, they're fairly close on power efficiency and though the 7850 is a more efficient purchase in terms of H/s/$, the 7950 seems like it could put out a lot more horsepower if you set it up right.
One important thing to note about the chart is that a lot of the ranking are very close. So, while you see 1,2,3,4,etc, they may all be within a VERY small range of each other. In the case of some of the ranking, if you look closely, there were even some out-and-out ties. (2 2s in the BTC Rank coloumn, 2 7s in the Overall Rank column, etc).