Replying to Graphics/Photo Computer

So. I am going to buy a computer for mostly graphics/photo work... would a Mac be best for it? Or A higher end PC?
Any suggestions?
I was looking in the area of a G3 or G4 for a mac.
'its the candybabyfountainwatertiretreadpencileraserdoorknobstopperbasketballhoopethiopianclockradiodivegooglegoggleboggle
shwartzchairlikeelephanttreessadbirdpootigerjuicebottlerumdrunkenmasterfighterkillertomatopastetoothbrushtailsantlersdisplaycase
toothbrushtailsantlersdisplaycasestudyhallwaydowntownassassinmaneateryoungkippurherringsrowboatankerwankerspankertankgirlpowerspice
meatballparmaseancheesewhizbangermetalhornsdogchowmeinstreetcardesiresexpleasethanksmaamspamalopecantelopeicecreamcone
meatballparmaseancheesewhizbangermetalhornsdogchowmeinstreetcardesiresexpleasethanksmaamspamalopecantelopeicecreamcone
phonehomebusinesscardsharkfinsoupnatsiscumbagpipesmokerlungbiscuitbowlnoodlesaladtongsbatontwirlertwistshakebakecakeholehumperdink kink rail.'