seems OCed 6850 offers good value compared to OCed 6870
lets find what manufacturers have add better cooler for 6850 without increasing price much
Gigabyte has a 6850 custom pcb, dual fan windforce, just like GTX 460 OC cooler. Price is as reference, 179$.
http://www.newegg.com/Product/Produc...82E16814125348