15 months ago I purchased a MacBook primarily for lightweight work, but it quickly replaced my desktop PC for basically all my work, including photo and video editing. I've got plenty of external disks and a seperate monitor to cope with the task, but a MacBook will never be a workstation. I've been thinking about buying an iMac, a Mac Pro (used or new) or building a hackintosh, but I thought a hard drivre upgrade might get me going a little longer with my MacBook. If anybody made the upgrade, how effective is the replacement of the stock 120GB 5400 RPM drive by a 7200 RPM model (such as a Western Digital Scorpio Black - 320 Go) on a MacBook 2,2GHz with 4GB of RAM? In terms of software, I run Lightroom, Final Cut Express, iLife and iWork on OSX 10.5.6. Most of my data is on external FW400 hard disks.