Looking at what you have i would use the following items.
Abit AB9 Pro (Has 9 SATA onboard and couple of PCI-E X1 Slots and Dual Gigbit LAN ports)
Use 4x1066 DDR2 memory
Use the SATA connections on the board and 6xSATA Intel® ICH8R offers RAID 0, 1, 5, 10
Use 2 SATA for RAID 1 for two drives...