Hi, here are the macs that i currently have : MBP 2.0ghz 2009 (home use) MBA 2011 1.7ghz i5 4gb ram 256 gb ( work + biz trips) 2 x iphones 1 x ipad mini i am an experienced architect and mac lover who travels a lot, mainly for presentations and doing contractual stuff on my laptops. I do not need to do intense graphic and drafting tasks but sometimes i uses the following softwares: Autocad (drafting & minor editing drawings on biz trips) Sketchup (viewing files) Adobe Acrobat (processing files) Adobe Cs (edit graphics) MS words Aperture (editing travel photos for fun) I currently have a MBA 13" 2011 version, and I love it for its portability and speed and it can handle most of my needs ie. photo editing, word processing, drafting. But now my 256 gb harddrive is filling up ( 2 x iphones back up, music library , a lot of graphic works etc) and I noticed the new MBA 11" can be custom made to 8gb and 512 gb SSD. I was going to purchase a MBA 11" with top spec so it's even more portable for my intense travel schedule. Then last week i noticed MBA 11" has only 5 hour battery life( compare to my current 7 hour MBA 13) and there's also the new MBP retina 13 with faster processor, better display, much larger 768 gb SSD and heavier weight than my MBA 13". I was going to purchase the MBA 11" yesterday online because it's much cheaper than MBP retina 13" and for its ultra portability. Life gets a little more complicated when Apple today decided to reduce the MBP and MBA price. Now the top spec MBA 11" and 13" are the same price and the MBP pro retina 13" is cheaper. Of course ultra portability like MBA 11" is important for someone who spends 2 weeks travelling a month but a faster processor, prettier display and harddisk are very desirable as well. The MBA 13" has longer batter life but it would just be an upgraded version of my current MBA 13" which one do you think i should pick?