I am planning on getting another external HD for my TiBook. Here are the two I am considering: * 250GB OWC Mercury Elite 7200RPM Combo FireWire Oxford 911 + USB 2.0/1.1 Solution. **Jumbo 8MB Cache Version** FireWire Cable, USB Cable, Dantz Retrospect Express & Intech SpeedTools included! 2yr Warranty. ($309) * 250GB OWC Mercury Elite 5400RPM FireWire Oxford 911 + USB 2.0/1.1 Combo Solution. FireWire Cable, USB Cable, Dantz Retrospect Express, & Intech SpeedTools included! 2yr Warranty. ($279) Is the extera $30 worth the 8MB Cache? How much difference will I notice? Thanks, Sam -- OS 10.3.2 Tibook G4 867 MHz, 1GB RAM, 32MB Video, 60GB HD 30GB iPod iChat: iSambouka