I have a blue and white G3. It's a lot quiter than the G4 and is in excellent condition. I ran DP on it for a few years and it was very stable and plenty fast.
I think it has a 40 gig Hd and 384 megs of ram.Firewire, USB etc. Comes with the zip drive but I have an external CD writer as well that I could throw in.
If that would work let me know.
Eric