Hi, guys, I am planning to switch to Mac Fantastic World soon just after the exam(oh, gosh, exams, suffer). After searching the threads here, I plan to buy 15inch power book for the bigger screen leading to higher productivity as said But after checking the online apple store, I find big price difference between the two 15inch models. They are exacly the same execpt for 0.17 Ghz cpu speed, comb vs superdrive and graphic memory BTO. But the price gap is as high as 200 pounds. I am wondering do these difference worth more quid, or are there any underlying different specifications between there 2 models. I basicaly do not have intention to use superdrive, nor additional external display. What I am care about is the graphic memory, is 64m enough? will I feel lag for the games like World of Warcraft, or Doom3 with 64m graphic memory? Thanks for help. I am eager to be a mac user.