If you are running Windows XP, the crases and freezes should be less. well, at leats thats the big idea - a lot dpeends on how you use the machine but i dont think i expected too many crashes on a regular XP machine (for me, its about once in a month, but i do meddle around with settings dirvers new apps and internet a LOT

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Graphics work is traditional Mac forte, where you have really nice and fast MAC apps. Be aware though, Windows you get more (cheaper) options.
Simplicity and Reliability are much better with Mac, and you wont ahve to worry abt viruses and trojans too much if u are going the Mac way.