I am using a 2006 Intel MacPro with 9GB RAM... I soek on large scan files from my CoolScan 9000 and never have a problem with speed using CS5 and LR3. I would HIGHLY reccomend CalDigit's fine external RAID VM series external drives run in RAID 1 configuration. They interface with FW800/400/ USB 2 and eSATA and are VERY fast. The new VR Mini's will actally run in the fielf via BUS power through FW800. CalDigit pre-tests the boxes before shipping... been using them for years after ending up with a stack of dead WDs and LaCie drives at the university I work at [IT department] I have had numbers of CalDigit external drives running our data for years 24/7 with no problems whatsoever.

I do not work for CalDigit