Hello, I have a Macbook Pro 13" 2010 but it is often a backbreaker in my backpack when carrying other equipment. I am recovering from a back injury and trying to keep it light. I have to process images on tight schedules in different locations using Adobe Lightroom so portability is very important. I am thinking of either going to go with: MB Air 2011 - 13" with 1.7ghz i5, 128GB SSD($1299) or go all in and get the MB Air 2011 - 13" with 18.ghz i7, 256GB SSD($1699). I looked at Anandtech air reviews and the benchmarks indicate a small 8-10% improvement. Have you used the i7 or i5 with Adobe Lightroom and noticed any significant improvements over an older Macbook Pro 2010? If there is not a real world big speed difference between the i5 1.7ghz and i7 1.8ghz, i will: 1) Buy the i5 1.7ghz 128gb ssd 2) use the $435(after taxes) price difference towards an OWC 256GB Sata 3 drive in the future. I hear they are faster than the stock MB air drives. 3) and use the stock one in the MB Air on my older MB Pro as a secondary SSD drive(if possible). What do you think? Thanks.