Hi My 3 yr old PC laptop was stolen couple of weeks back.Planning to buy the 15MBP to replace it. Needed help from the forum members in choosing between the i5(2.4 ghz) and i7 (2.66)models. Usage is mainly web surfing, documentation work, running AutoCad couple of times a week(6-10 hrs total usage) and recreational gaming. Questions I have 1.Would the i7 model with the extra 256 MB graphics ram and 33% more cache with the little bump in processor speed make a difference in running AutoCad (would be running it in bootcamp) especially in rendering. 2.Does the extra ram in the graphics card and the increased hard drive speed ( if I go for the i7 would choose the 7200 rpm drive since its only a $45 upgrade) in the i7 reduce battery life as compared to the i5 keeping screen brightness and other factors the same. 3.In normal usage ( web surfing,watching movies etc.) would the i5 run cooler as compared to the i7 model with the 7200 rpm drive Also, appreciate any suggestions on configuration. Thanks in advance.