They look all right?
Can't think of why you'd buy one over a PC.
All the useful design stuff is also on PC if you were worried about that. A lot more pricey for what you get. You can't build your own/customize (as in take the case apart, switch out your motherboard, cpu etc.)
One thing that really bugs me is that while one program is doing something, you can't do anything else. ie. If you were using word in Windows and it does that thing where it turns white and says program not responding, you can still use your other stuff while waiting for it to see if it comes out of that. When that happens on a Mac (and maybe its just bad luck for me, but it seems to happen every time I use one) it puts up that little colorpinwheel thing and you can't do anything until it resolves. Because of this, it also makes it seem like macs load a hell of a lot slower.
It seems like anything that isn't Adobe likes to lock up. Using Maya and Word on a mac was a nightmare for me. Rendering would take forever on a mac speced similar to my PC that would take maybe an hour for the same animation. Word likes to crash or lock up causing you to use Force Quit.
I haven't looked into the system stuff too much, but off the top of my head I haven't seen some of the more useful OS tools such as the registry editor or system restore points. Someone might say that oh macs don't need that stuff because they are so stable and awesome, but even if you really do feel that way (obviously I don't) it is extra options that you don't have that are very nice if you screw up your drivers.
I realize you asked why would you want to get a mac, but I guess the why not naturally comes with it.
