I am a longtime scrapper and have always used a Mac. I use Photoshop (full version - now CS3) and iView Media Pro to organize all of my scrap elements and also all of my pictures. Font Book (comes free with the Mac) is a great font organizer. Painter's Picker (shareware) is a very useful color picker that is only for the Mac.
Hope you come to love the Mac as much as I do.