I'm a very agressive user. The 4200 rpm will get you by, but you may seldomly experience a few seconds of harddrive seeking. I'm in Photoshop and Flash all the time, so I will be upgrading to 7200 rpm. If I were you, I would get two 120 7200rpm drives, and then get one external usb/firewire drive of atleast 250gb. I've got one internal 4200rpm 200gb, one 250gb western digital usb external (for backup), and will be swapping out the 4200 rpm with a 7200rpm 120gb. Goodluck!