You may want to consider buying a new/refurbished G4 based computer. Go to
http://store.apple.com/1-800-MY-APP...AbxY/0.0.7.1.0.5.13.0.3.0.0.0.0.3.1.1.0?21,42 to see some refurbished models of G3 iBooks and PowerBook G4's. Trust me, you'll get your money's worth if you go for the G4: better load times, snappier editing of DV and photos, the list goes on and on. Not to mention that Panther works much, much better on a G4. G3's are find and all, but Apple has clearly been trying to phase them out.
I have a 12" PowerBook G4 rev. A (with a 867Mhz G4 chip) that I positively love. It's got 640MB of RAM, so it's snappy in that department. Plus, Panther purrs along on this thing. It's a really fine machine. Amazing portable, too, check out
www.apple.com/powerbook/index12.html for more info. You can get it as low as $1,399.00 on Apple, maybe cheaper on eBay. Buying from Apple right now, by the way, has Panther pre-installed. Unless you already own it, you won't have to buy it new.
If you're a teacher/student/professor or somehow connected to a school/college, you can get discounts on just about any Apple product. I am pretty sure you can get discounts it you're a buisness user.
Hope this helps you!