[Bob Gerber] "uppose your client wants to use After Effects 6.5 Pro which won't even run on a Mac"
WHAT???
Bob: You're opening the pandora box, here.
Not only does After Effects 6.5 pro work on the Mac, but....
1) Adobe made a public statement that the next version will also will work on the Mac (the release of Apple's Motion made some people speculate about whether Adobe would kill AE for the Mac, they made clear they won't)/
2) The independent benchmark tests designed by no less than AE guru Brian Maffit show consistently the G5 beating anything Intel/AMD CPU on AE (I'm not saying they're always faster, they are for AE).
3) After Effects on the Mac still has featues the PC version doesn't have. While 6.5 is the first version that allows prosumer level, native Firewire DV previews on Windows, the Mac version has had external previews up to 16 bit uncompressed with for years. Still has the edge there.
So, if you are interested on compositing, both Windows and Mac run After Effects and Combustion. But only the Mac runs Motion and Shake (well, there's a Linux version of Shake too).
Please try to be more informed.
All the best.
Adolfo Rozenfeld
Buenos Aires - Argentina
http://www.adolforozenfeld.com
adolfo@adolforozenfeld.com