The gigabyte board meets yur requirments:

Memory: 6x DDR3 DIMMs, 3 Channel, Max Capacity 24GB
Slots: 3x PCI-Express x16 Slots (Support CrossFireX & 3-Way SLI; Support PCI-Express 2.0); 1x PCI-Express x4 Slot; 1x PCI-Express x1 Slot; 2x PCI Slots
IDE/SATA: 1x ATA-100 Channel; 10x SATA2 Ports, Support RAID 0, 1, 5, 10

http://cgi.ebay.co.uk/Intel-Core-i7-...17118001r32985



Not sure about 8 DVI outputs, but you can get 3 video cards on this board.