Hello everybody, this is my first post, so here goes. As stated, I'm planning to update my July/August 2006 Macbook (2 Ghz Core Duo, 1Mb RAM, 80Gb) to a spanking new 17" MBP once the next updates come out(Jan/Feb?), and I was wondering about the difference between the 5400 and 7200 RPM harddrives. Is there really that much difference between the two (i'm not exactly a power user...), and how much extra battery does the 7200 take? I mean, if it's 30 mins off of 5/6 hrs(I think I read that this was about the real world life battery life), that's not really a big deal, but if it's a couple of hours, then that's serious! Also, could Apple seriously not include the new Arrandales into their next updates? If they didn't, surely they'd need to beef up the new release with other extra features to make it a meaningful update (i'd love Bluray, but I accept that's unlikely). Thanks in advance for your replies.