Video Capture Hard Drive: Firewire or IDE?

[JeromeERome]

I just got a new video capture card and realized that my extra 40GB HD I am using for my capture disk is only 5400RPM. I am unable to capture at high DVD resolutions using the Huffyuv codec without dropping frames or losing audio synchronization. I plan on purchasing a new 7200RPM drive. I am trying to decide between a Western Digital Caviar drive which is UltraATA 133 on an IDE bus or a FireWire based HD. The firewire seems like it would be faster since it can run up to 400mb/s bus. Anyhow, what are you guys using in your systems and which would you recommend for video capturing/editing?