slightly ghetto san

We've got a Procurve 2810 switch that I'm using to run the whole office network. But I'm planning to use it to run a video network.
Mostly for AFX rendering, and Pro_res editing.

Here's what I'm planning to do: ( a geeky xmas by the looks of things)

Use a PCI-e G5 with 4gb of ram.as my video server
Connect an 8-drive SATA RAID to it via a highpoint card. So that's the storage.

Connect the server to a Procurve 2810 Gig-E switch via 2 ethernet cables.
Configure the Procurve to 'enable jumbo frames' and whatever needs to be done to make the link aggregation work.

Connect it to:

3 x Mac Pros via dual ethernet cables with link aggregation.
1 x Mac Mini via a single cable.
1 x PCI-x Mac G5 via a single cable.

Trying to work out how to best connect this network to the office network and internet. I am not an IT person. I've put together raids and done basic networking but nothing fancy.

Do I:

a) Get another small Gig-e hub for the office network..And another ethernet card for the PCI-x G5 and use it as the link between the video and office networks.

b) Cleverly configure the Procurve to handle both office and video networks.

c) Get a proper IT person round here to do it and let him charge me the normal amounts to tell me I have to upgrade all my computers.

d) Reassess the situation.

???

Any advice much appreciated.

Seasons greatings!

M