A 10000RPM drive such as the WD Raptor only helps if you need to do significant random access to it (e.g. an OS and programs drive, or a scratch file for Photoshop). Even then, the benefit is not large enough to make the additional expense over a normal 7200RPM drive worthwhile unless you go beyond basic office tasks. If your applications run from the network, then you'd see practically no benefit at all except for booting the OS. As a side note, if you think it would help due to faster swap file access, then you'd be mistaken - US$160 is much better "invested" in a couple of GB of RAM to make the swap file much less necessary.