Hey, I recently got a HD camcorder. I'm now in the market for an external hard drive for a late 2006 MacBook Pro for editing the HD video. Would you recommend getting an external FireWire 800 hard drive or just a regular USB 2.0 hard drive? I understand that all 3,5" hard drives are 7200 RPM but should I also look at other specs such as the cache? How about a 7200 RPM 2,5" disk - would it be alright for HD editing? Thanks for your help!