I know an external scratch drive should be 7200rpm, FW400/800/eSATA and so forth (I've been using an OWC Mercury Elite Pro for several years and love it)... But I'm going to start editing on a PC soon and was wondering about the following questions: - Does it matter if the external enclosure doesn't have its own power supply? It's just a USB 3.0 plug and the end that plugs is nothing I've seen before - I don't know if it's proprietary or what. Image of the enclosure and cable can be seen here -http://www.patriotmemory.com/product/specs/gauntlet_pkg.jpg (couldn't find a front picture of the cable) - Are there any disadvantages editing on a 2.5" drive vs. 3.5"? It will be 7200rpm either way. - Will I see any improvements in editing over USB 3.0 vs. eSATA or FW? Thanks in advance for your input guys.