I'll spring for a G5 in January. I'm hoping for a speed bump after the Expo, but that's not why I"m waiting. I have a two-year rule and January is the two year anniversary of the box I'll be replacing.
I'm also not worried about so-called Rev A problems. I've bought many Rev A machines for years and never had any more trouble than Rev B machines.
Part of it is that I'm going to be completely objective and see what the G5 reviews (official and unofficial) say. I'm also going to the Apple store and running some tests of my own. If it's what I expect it to be, then I'll pop for it.
As for dealing with Windows, obviously I'm fully aware of the Mac benefits, but since I make my living entirely from computer performance issues, I'd be stupid to ignore the (previously true) fact that the PC absolutely destroyed the very best Macs in performance across the board. And before anyone challenges me on it, don't waste your breath, I have all the self-confirmed data (we use PCs here too) to prove it. I can accept a small performance gap, maybe even as high as 20% for the pure bliss of OS X, better multi-tasking, better experience, things just "work", etc. But at some point, when I'm still waiting for things to render, launch, open, transfer, copy, paste, etc., I'm losing money. Period. That ain't gonna happen.
I fully expect the G5 to solve all those problems.
Hulk, you've got one on order, yes? Can't wait to hear your (objective) reviews. And none of that first day, holy crap it's faster than anything stuff. But one of those truly objective, month long analysis reviews.
We all (me included) tend to suffer from the illusion that things are better/faster than they really at first, especially when we just dump a few thousand dollars on a new machine.