if you already have a licensed copy of C1.1, you might want to consider upgrading to C2. i've used C2 on a bunch of different machines, (G4 400Mhz, G4 MP 1Ghz, P4 1Ghz, and P3 550Mhz) and found it worked like a charm on PC's with XP

The openGL integration seems to be stronger on PCs. For example, i had an ATI Mobility w/16Megs of RAM and it was moving the scenes around just as fast if not faster than my MP mac at work with the nVidia Ti 4600 w/128 Megs. Go figure. Even the P3 550 which has a lousy integrated video card was competative with the mac.

The mac was a wee bit faster at rendering (this was before the patch, so it's probably faster after that. i still haven't had time to test, though) anyway, since it has two processors, it could chew through big renders.

but getting to what means the most to you... stability.... i noticed that C2 worked like a charm on both PC's and they had winXP pro. in fact for the week that i was using the P4, i don't think i crashed once.

there is such an immense gap between the stability of C2 on PC's to that on Mac (let me just say that i didn't do too much work with C2 before getting a machine with Jaguar, and this may be a large part of the problem)

anyway, the PC seems far more suited for scene building because of smoother interactive render, where as i like my mac for rendering and texture building, postprocessing and editing.

let me finish by saying that C2 was so nice on the PC, i will probably be buying a cheap dell in a month or two just to build scenes and animate on.

hope this overgrown mess helps. a bit.

-pix