Macs and PC's
I produce exhibition graphics to earn a crust, these tend to be large format digital prints and most stands require some design input from myself. I use the industry standard packages of: Quark6 ( dtp package) Illustrator and Photoshop. All of these are available in either PC or Mac flavour and I use them on both platforms. Modern Macs (OS 10.3.XX) will network quite happily with PC's - so its a difficult question, I dont think that there is much to choose between any platform as far as performance goes, if aesthetics are inportant then Macs win hands down. Corel tends to be the poor relation to Illustrator but I know designers who swear by it - yer pays yer money and takes yer choice!!