Yesterday i did a second build (10.8.0) which was somewhat successful. Apart from the sleep issue and "my" displays arrangement issue everything else worked just fine.
Now every time i restart it rearranges the displays in different order.
My friend has the monitors connected to 3 Radeon HD 6870 (no idea of sub model i dot follow radeon cards and their specs).
If anyone has an idea or information where i should look into i would appreciate it.
Asus Rampage Extreme 3 with i7
3x ATI Radeon HD 6870 256bit
6 asus monitors