They all have 8 + 2 power phases and are SLI capable (Atleast 2 x16 PCI 3.0 slots) so which will be your choice? Please suggest nothing more expensive than the boards listed below, I think the MSI 990FX board, just from the chipset.
http://uk.pcpartpicker.com/part/msi-motherboard-970ag46
http://uk.pcpartpicker.com/part/gigabyte-motherboard-ga990xaud3
http://uk.pcpartpicker.com/part/msi-motherboard-990fxagd65
http://uk.pcpartpicker.com/part/msi-motherboard-970ag46
http://uk.pcpartpicker.com/part/gigabyte-motherboard-ga990xaud3
http://uk.pcpartpicker.com/part/msi-motherboard-990fxagd65