it's simple, macs are fast, their stable, and hell they always look good :").. thats why i love macs, they will always be great computers. a ibook-500 is just as fast as any 500 doller pc, easy :P
-MacX
i been a mac user for many years, so im not sure ur comming from, however i do run a pc (sadely as well) i run debian on both. i love open source, their is afew open source programs on mac. use version tracker and sourceforge!
-MacX