Ok. So it's time for a new external drive. I'm beginning to get a bit paranoid about my current setup, largely due to the age of most of the components. Current setup: OWC Mercury Elite 500GB (5+ years old), used for iTunes library and occasional scratch disk (photoshop, mostly, no video editing or anything like that just yet). OWC Mercury Elite 250GB (~7 years old), used for TimeMachine. WD Passport 160GB (~3 years old), used for monthly cloning of the 250GB drive in my 13" UBMBP Questions: 1) Quad, Dual, or USB interface? I would love to take advantage of the FW800 on the mbp, but do I really need it? (The 500 and 250 are currently daisy-chained to the mpb via a FW800->400 cable.) Given my needs, will USB be enough? I could save quite a bit of $ and get a bigger drive if USB will be sufficient. 2) PreBuilt or DIY? I would like to build my own (OWC Mercury Elite enclosure with WD Black HD@1TB), but I could save a bit of cash buying a pre-built WD MyBook or LaCie or Seagate, though I would like to stay away from LaCie (who knows what they're putting in their externals) and Seagate (since I have no experience with their products). I also don't particularly trust Hitachi drives (in the prebuilt OWC externals), since I had a Hitachi drive die on me after less than one year, and have been unable to get a reply from Hitachi despite the three year warranty, though I've had no problems with the two OWC drives, even after 5+ and 7 years. 3) Are 3.5" external drives any better for long term usage than 2.5" drives? I'm just curious here, since I really want to get up in the 1TB range (or maybe even 1.5TB), even though my current storage needs are in the 500GB range. But if I could use a couple of 2.5" drives instead of my current setup, I could save a bit of desk space and more easily move my setup. Have I forgotten anything? Thanks in advance for your help.