hi, this is my first post and i am finally thinking about getting a mac. i am most likely going to get some kind of laptop and it will probably be a macbook. i'm not going to be doing any sort of gaming on it and ill just be using it for basic ilife applications and email. since thats all im going to be using it for, do i really even need the SR chip or any sort of graphics upgrades like that? i do expect it to have good performance and last me at least 3 years so i would appreciate any suggestions. thank you.