I have an 867 MHz G4 tower and I have installed Leopard on it. To my surprise it works very well indeed. I added a faster Ultra ATA disk and it's practically flying. The biggest drawback to speed on the thing in Leopard though is the graphics card. Currently I have an NVIDIA GeForce4 MX in it with 64 MB VRAM. What graphics cards, (or are there any?) can I get to spice this thing up that will work with the operating system? Anything with more VRAM would be good.