First, 3d and AMD cards don't go together (not the tech, just almost no support). You need to decide if you want eyefinity or 3D (nVidia)
Secondly, go for the 3770K (or 3570k). The 3930k is nice, but not worth the price if you don't plan on using CPU intensive programs like video editing etc.
And finally for the motherboard. Most mid-range motherboards have a few PCI slots on them. Brand wise, stick to ASUS, MSI or Gigabyte.
As forthe screen and burner, no idea.