Can I use a G5 tower as a file server and connect it simultaneously to a Mac Pro (via Fibre Channel) and to an Ethernet network?

I have several G5 towers that I'd like to repurpose. I'm wondering if I can install a Fibre Channel card in one, and a Fibre Channel card in my Intel Mac Pro, and connect the two. The idea is to have block-level access (as if the G5 and all the drives attached to it were directly connected to the Mac Pro), and have access via Ethernet for other computers on the network.

We are doing video editing with Final Cut Studio, and several computers need access to the same files. However, two (an iMac and a Mac Book) only have Ethernet or FW800 connections.

Are we barking up the wrong tree? Would 10G Ethernet or iSCSI be a better solution? I was thinking Fibre Channel because there's more history with it.

Also, I have an older Xserve G4, so I could utilize the XServe OS license from it on the G5.

Apple Dual-Channel 4Gb Fibre Channel PCI Express Card

Apple Dual-Channel 4Gb Fibre Channel PCI Express Card

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