I'm agree! My 4150 is extermely portable, I can read e-books, listen music and take PIM at any time. I even extend the battery life by running at 100Mhz, still responsive with acceptable performance. At 100Mhz, I can listens up to 7-8 hours OGG music.
Finally,my daddy choose HP 4150 its very 輕薄,無線網也 very easy to use,if u buy in HK,you can get a Photosmart 130 (Printer),one 100 dollars supermarket's 禮券 and one Limelink software's CD