In your opinion, If we take 4 laptops. How do you think overall their speed and performance will be against each other? In other words, In percents, how fast each computer will be comparing to a control one (you choose which one). Example: ibook - 20% slower than 867 Mhz 12" Pbook. 900Mhz G3 14"1 iBook 867Mhz G4 12"1 Pbook 867Mhz G4 15"2 Pbook 1Ghz G4 15"2 Pbook How would they stack against each other? Would 900Mhz ibook be far behind 867 15" Pbook? I'm also interested how far G3 is behind G4. How much faster 900Mhz G4 would be over 900Mhz G3?