2c + VAT
Mac is perfect if you are stand alone designer/layout profesional who needs stability when running the whole Adobe Suite at once; and of course the notebook looks cool at a coffeshop :-], but in a prepress network environment I found Mac is not as adaptable and stable, often taking much longer to reconnect to servers after any shutdowns or network updates. The cost of a comparative windows workstation is less and the reliability of Windows running MIS, design/layout, prepress worflow as well as online browser applications is great.
In my experience IT folk hardly know or are hardly interested in Mac issues. For years I was VERY Pro Mac and PC's were for "secretaries and bean-counters" (it was about 1994 the PowerMacs 8500/9500 era), but PC's and cross platform applications have come into their own quite nicely thank you.
Macs are lovely but a tad overated for our purposes.