I decided to hook up my MacBook Pro to my Nikon Super CoolScan 9000 ED for this task, and let it scan away whilst I concentrated on working on the other two machines. Like a maniac, I've been sliding my office chair between these three machines for the third day now!
I've always used laptops out in the field to edit and file photos from assignments. I've never had a laptop work intensively for anything more than a few hours at a time; until now. I've been working away from around 10am to around 2am the following morning for three days solid. I'm just stunned that the MacBook Pro has been absolutely stable without even a sign of a hiccup. Its been scanning 220Mb images, some of which have had a lot of processing done (due to scanning settings like shadow and highlight adjustment). I'm just stunned that in this heat (alas, I don't have air conditioning), working solidly all day and evening long, doing intensive work, my little MacBook Pro's just got on with it, without the slightest tantrum. I expect this from the Mac Pro and the iMac, but from a laptop? Amazing!