1.) Neither Adobe nor Apple have an interest in doing a "direct comparison" benchmark. However: There _are_ benchmarks about Adobe's apps out there. Look for them.
2.) If you're, as you put it, *really* fed up with Windows, there's really only one way to go right now. Mac. Depending on whether you're looking for a desktop machine or a portable, you have the choice between PowerPC or intel Macs. You clearly want an _intel_ Mac, though, because you want the machine to work well in the future as well, and for all tasks, this means that an intel machine is the way to go. Sure, a PowerPC PowerMac is still a good machine right now, but compared to what intel professional desktop Macs will be doing with Universal Binaries, they're simply out of the loop in no time (no time meaning "now" for some applications and "up to a year" in other cases).
3.) Since you've already stated that you _want_ to go Mac and want to do so rather sooner than later, I'd say you'd have to wait for Apple to complete the transition to intel (this Autumn, probably) and take a closer look then.
But asking Adobe or Apple for benchmarks here is not the way to go. Make first hand experience. Run Adobe's software on currently available Macs. With actual _work_ files you have. So you can actually have hard facts. What good are some benchmarks run on tasks that you might or might not find interesting.
Mac user since 1987. Running Mac OS X 10.8 Mountain Lion on a MacBook Air 11" & an iMac 27" and whatever's newest for my iPhone 4s, iPad 3 and AppleTV 2.
Apple Certified System Administrator 10.6, Apple Sales Professional 2008-2011, Apple Certified Mac Technician.
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