After getting a MacMini and playing with it for a few months, I've decided to take the plunge and and fully embrace the glory of Apple computers, bagging my 17" HP notebook in the process. I am torn between the 12" and 15" PowerBooks. I believe I understand the primary differences between the two other than the size: The 15" has more ports, a faster processer (1.67 v 1.5), faster ethernet, and a lighted keyboard, slightly better video card. Regardless of which I get, I plan to upgrade the RAM to 1GB. If I get the 12", I'll also get an external monitor. I'm struggling with the issue of portability (which ultimately only I can sort out). Having said all of that, here are my remaining questions:  What is the real-world battery life of the 12" PowerBook?  What is the real-world battery life of the 15" PowerBook?  Will any LCD monitor work with the PowerBook (as long as I have the necessary adatper)?  Do all PowerBooks sold at the Apple store come with Tiger preloaded?  Is the AppleCare extended warranty a "must"? It adds a considerable cost to an already expensive machine. (I've never had to have any previous notebook repaired)... Thanks for your help! I may just go out and get one this afternoon.