R9 280X Graphics Card by Asus.
The cheapest I've seen it recently!
PCI Express 3
2x Native DVI
1x Native HDMI
1x Native Display Port
I've only just recently bought one myself and can vouch that it's worth the money. There are also some good downloads from AMD to tweak your Bios to make this run smoother and so that you can manually adjust all of the card settings - such as fan speed, voltage, memory clock, and frequency.
Review - http://www.guru3d.com/articles-pages/asus-radeon-r9-280x-top-review,1.html