I need to buy a video conferencing setup. I am unsure if I should go with a G5 based system or a G4 (cheaper!) based system. It would be mostly for one to one conferencing over cable modem lines. My choices are: 2 imacG5s with 2 isights OR 2 ibook 14 inch 1.33 G4s with 2 isights The prices are remarkably similar. What would performance differences be? I would upgrade ram on my own to 512mb in either case. One more question: how would performance differ with a low end powermac g5 over the low end iMac g5?