Okay, I searched for another mainboard (because you said I could get another cheaper

)
What do you think of that one: ASRock 870 Extreme3 ATX Sockel AM3 ?
(USB 3.0+2, Crossfire, DDR3 1066-1866, 80€)
or: Gigabyte GA-890XA-UD3, 790X Sockel AM3
(USB 3.0+2, Crossfire, DDR3 1066-1866, 122€ - but at hoh.de is a bundle with the 965BE, to get it cheaper)
or: ASUS Crosshair III Formula 790FX, AM3
(USB 2.0, full Crossfire, DDR3 1066-1600, 147€)
or: Asus Crosshair IV Formula
(Sound, G-LAN, FW, SATA3, USB 3.0, eSATA, 180€)
And what do you think about that cpu-cooler: Arctic Cooling Freezer Xtreme Rev.2?

I am still not sure about the graphics card, because the friend who want to buy my actual pc, want to get it earlier...
But I guess I would take the 5870 (because of microstuttors of the 5970) Toxic Edition:
Sapphire Toxic HD 5870 2048MB GDDR5 PCIe
Another thing:
2x XFX 5870 1 GB - what do you think? Better than the 5970? Or better take the Asus R.o.G. 5870 2GB ?
So many questions..