Hello. I got the SR 17' MBP and Apple kindly swapped it with the new 2010 MBP 17" due to the NVIDIA problem. I think the weight of the 2007 model was about 2.7kg but the 2010 one I got is 3kg. After using it for a few months, I am considering to get a lighter computer for non-computationally intensive work. Which MBA do you recommend? The 11 model seems attractive but I worry about the letters being too small. (My eyesight is not that good.) They do not look that bad in stores but I may have problems if I use the machine for a long time, say in 2-3 consecutive hours. I am ok with the 17" model though. How many more extra weight will be put on the laptops if I max out the 11 and 13 models? Thanks.