I must say that the continued comparisons between Amiga and PC/Mac hardware based upon GHz and such like are not at all helpfull. I'm not going to try and convince anyone that a 700MHz PPC can out perform a 6 core super beast PC when raytracing and such but the clue is in the wording, PERFORM! It's not numbers of cycles that matter, it's how fast and well a computer gets the job done. If the job in question is picking up a few emails and the process is that of turning on the machine, collecting mail and turning it off again then one could argue that a SAM out performs many modern PCs as the job may well be complete on the SAM by the time the PC boots. Even on x86 based machines some tasks are no quicker now then fifteen years ago with a 486. It all depends on what you use the machine for, if 99% of that time is typing then the big speed up comes from improving the speed you type at does it not. This is also abou what resources that are available, windows eats cycles for breakfast leaving less available power then the numbers may suggest. Take all this into account and we see that hardware comparisons are not, by a long shot, the whole story.
Please note I'm not having a dig at anyone here but it's a fair point that needed a mention.