I need help deciding. I currently have: 17" FP iMac 1GHz G4 with 512mb + 256MB for 768mb total 12" iBook 800mhz G4 with 128mb I need to upgrade the RAM in the iBook to make it usable. I will not be purchasing a 256mb module, just doesn't make sense. So, should I stay within my budget and just pick up a 512mb module for the iBook for around $100? Or should I take the 512mb SODIMM out of my iMac, put that in the iBook and then spend $260 ($160 more) for a 1GB module for the iMac? How much of a difference will I see in the iMac going from 768mb to 1.25gb? I'm not a big power user but around 4 times a year I do a marathon video editing session where I take footage of the kids and make a few DVDs. Generally I just use Office, web, email, and iLife apps. I know that DVD encoding will not speed up with more RAM. So, being that I need to spend at least $100 is it worth spending the extra $160 to get the 1gb for the iMac? Any thoughts?