Digital BW, The Print

Does anyone out there have a recommendation regarding networking 3
Macs(G3-G4DP-G4Cube)--two monitors...one user?
Here is what I need/want:

I want to be able to open any file on any drive and use both monitors. I
would also like to have internet access from any machine. - I have a DSL.

I thought I had it all figured out until I started looking at what I needed.
I want it to be fast and have the 10/100T ethernet ports. I know I need the
5Cat cable. But do I need a hub? Timbuktu?

Any advice appreciated. Off line is ok.

Many thanks in advance, sorry for the cross post.
trish