You need a 7200 RPM hard drive
A 7200 RPM hard drive is necessary to capture good quality video without frame loss. If you realy like to check your hard drive write speed. You can go to www.nero.com to get the CD-writing software NERO Express. Normally a 5400 RPM HD has a write speed approximately 18 MB/sec and a 7200 RPM HD normally at 38-44 MB/sec.
Good luck,