Mac/ PC
I have both platforms. Mac G5, OSX Panther and PC WinXP pro. As a designer for print, I find the Mac preferable to the PC. (it's mostly a font issue) plus, most all pre-press is Mac. For web design, I prefer the PC. as
noted, there is more available for the PC. I have Adobe CS2 on both machines. It took awhile, but I was forced to work with the keyboard commands, which are virtually the same for both platforms, I've discovered that if you learn these, it doesn't matter which one you're working on. I've heard that Mac is coming out with a R-Click mouse.
I don't find either platform to be any better or faster than the other. It's all a myth. It's a 'red wine v. white wine' thing. or 'BMW is better than Lexus'.
Who really knows which is best and who really cares. It's what You can do with it that counts. If you're good, then an IBM386 with Windows95 and Photoshop 4, is good enough