I am a graphic designer, i have a ibook at home and work on a IMAC at my job. I must say that for work in my field MAC are the best, it offers great stability, no blue screen of death (but we have evil rainbow ball) but it doesnt crash at all. The only bad thing about mac is that sometimes, out of nowhere they just shut down o.o its weird, but rarely happens.
PC has a wide field for improvement you can always put a lot of things on them, easier to handle and you can play games in them. MAC are really expensive and sometimes they offer few things for an outrageous price and a PC with the same stuff is usually cheaper.
MAC is not affected by too weak PC viruses.
I could say that if you have the money and want a computer only for work a MAC is the best, but I will go for PC now since you get more of what you need.
I know that since MAC got centrino with boot cam and other software you can actually install windows partition and run .EXE, but is not the same, is never the same (and to improve a mac is way to expenseive ) ... I wanted to buy more RAM for my IBOOK but it seems cheaper just t buy a new laptop pc with a lot of good stuff -.-;;
well this is my 2 cents
