I have a 74gb Raptor, 10k rpm sata1.5gb. Right now its setup as my main drives and holds all my programs, all other files go to larger drives. Should I keep this or should I just replace it with a 500gb 7200.10 seagate sata3.0gb? Am I seeing much benefit from the raptor? I didnt really notice a difference when I had a different drive setup as the main.