No need for anything special... my file server has 1.5TB of storage off a cheap ECS G33T-M2 matx mobo with an e4300. Has on board pcie gigabit thats connected to the 100mbit router to get to the outside world. Then two more gigabit nics to make up my special gigabit lan between my main comp server and htpc.
And i still got 3 sata ports left on the mobo, and 1 left on the pci raid card. I love it