I currently own a Quicksilver 800 single processor. I have the Apple 17" LCD. I upgraded the CPU to 1.25GB RAM, a 120GB Western Digital Special Edition hard drive, and SuperDrive. I was thinking of getting a G5 but it is more computer than I need. I use my computer for audio, MP3 downloads, digital photography, and database. Will the 15" Powerbook serve my needs. How will it compare to my Quicksilver in terms of performance. Thanks