Would you recommend the Dell XPS, Powerbook G4 or Alienware 51-m for iTunes use, multitasking and cpu intensive apps? I need good ripping speed for iTunes, a decent video card, a BIG/fast hard drive and good reliability. I would like to try a mac but I'm not sure if it will be as fast as a pc. Do the latest G4 cpu's run the latest mac apps well? Battery life isn't really an issue but I want decent wireless internet capabilities.