I'm a P.C. user and have been all of my life.  I am switching to make as I trying to start a company that will create music for its clients commercials, movies, etc.  
  
  Like I said, "I dont know MAC."  If I were to get a Powerbook 15.2 in. with a 1.25G processor, 512RAM which I would plan to upgrade to 1G, and a 60Gig harddrive, would this be able to handle my music production needs.    
 
   Also, it appears that the M-audio Firewire 410 is not the first choice of audio interface, so what would be an alternative for a notebook.  
Thanks a lot,
Gavin