I have researched 500 GB 7200 RPM hard drives and am deliberating on two: the WD Scorpio Black and the Hitachi Travelstar. I realize the Scorpio Black is a little faster and the Travelstar is a little bit better on power conservation, so I am curious if either will make a difference with my typical usage. I usually have around 3-5 applications open at the same time (one or two browsers, word processor, iTunes, Accordance, BookEnds) and sometimes also Fusion. I am mostly interested in if the Scorpio Black will be much faster with multitasking because it handles I/O operations and multiple threads better. Lastly, I am a little concerned about the vibration of the Black and about the load cycles on the drives. Does HDAPM work with both drives? I also know WD has released WDidle3 for the RE2 and this supposedly works with the Black to set the APM, but requires windows--not sure if this is possible through Fusion and not BootCamp. I appreciate any help in deciding because they are both about the same price currently. Other feedback is also appreciated. PS--I am not interested in the Momentus XT because I do not often use the same apps every day and I do not trust Seagate's firmware at the moment.