I usually prefer Sapphire, HIS, MSI, Asus on the ATI side and Gainward, MSI, Asus on the NV side.
However, here are the links:
http://www.evomag.ro/COMPONENTE-PC-Placi-Video/Sapphire-Placa-Video-Radeon-HD-7850-2GB-GDDR5-256bit-DVI-HDMI-DisplayPort-font-colorredPCI-E-3.0-font-92276.html...