Hi guys, i have been reading this forum for past 1 month and I am extremely impressed by the amount of information available here. this is my FIRST ever post here. I have been using MAC laptops for 9 years now. Mt first one was a powerbook G4 in 2000-01 , which I replaced with a NEW powerbook G4 in 2004. This book from 2004 has following characterstics Powerbook G4 Titanium, 15" processor : 1.25 GHz power Pc g4 memory : 1.25 GB DDR SDRAM Hard disc : 80 GB Now the interesting thing is that this laptop is working brilliantly even after 5 years. Though has become quiet dirty etc. The negatives : I do feel it becomes slow when too many windows open I am not able to burn DVDs in it, which i want to do I do hate the spinning wheel which comes time to time. I had installed a new battery in 2008 but it never performed well. I had bought a new power cord for it as the old one was giving problems. expenditure about 300$ or so. I also upgraded the memory from 500 MB to 1.25 Gb last year. Now, i am perplexed on my next course of action. I am itching to buy a new macbook pro. The main things I do is watch DVds, surf internet several hours a day and do official work on Mac office. No video editing or photo editing. I am a world traveler, traveling constantly. Money is no issue. I am longing for a v v fast computer. I dislike the spinning wheel. I dislike the the delays when surfing the internet. I dislike the time itunes takes to open up etc What I should do with my old laptop? if I sell it, what should be the correct price for it?? Which is the new laptop I should buy? Mac air, 13", 15" or 17". believe it or not, i love all four of them!! I love the air for its weight. I love the 17" for its big screen and sturdy look. 15" seems to be a good all rounder. 13" seems to be a good amalgamation of pro and air. Will one of these new laptops perform really 100 times better than my present one? what to expect?? i have been to mac retail stores v often but cant make up my mind!!! Any advise would be highly appreciated.