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Well, I don't think, that moving from Mac to Win is a really good Idea. I had to write this year about the history of multimedia, and I was surprised, how often I met sites with the introduction "... available ... only for MacIntosh users", so I had to look at that apllications at friends who had a Mac to be able to make at laest some screenshots for my work.
I didn't thought before, having a Mac could be a good Idea, first because it's much more expensive and second because the people who I work with have seen in UNIX systems the really alternative to win and didn't even thought about something else.
I saw, that your article is about 2 years old. Have you thought about new software, such as Director from Macromedia, which, different from Photoshop or Office Software need both: a Mac and a Win PC to make applications which are crossplatform?