Hello All, Long time reader, first time poster It's time to take the plunge and get a mac - better late than never right I waited for the release to figure out what's out there and I still have one last doubt and am hoping you can help me. I'm undecided between the MBA 13" and the MBP Retina 15". My needs are the following. I need the portability since I still need to carry my HP work laptop around when I travel. I will use the Mac really as a "toy" for browsing, email, photo editing, movie watching, using on the plance, etc but as I have some programming background I also want to develop some apps for the ipad/iphone and would like to install the apple SDK. Considering pricing I see I can get an upgraded MBA 13" configuration for exactly the same price as the MBP Retina 15" The MBA would have 512 SSD as opposed to the MBP with on 256 SSD I would get 8 GB RAM on both So the differences would really be in the processor and the display (of course) 1. would I really feel a difference between the MBP 2.3GHz Quad-core Intel Core i7 vs the MBA 2.0GHz Intel Dual-Core Core i7? 2. Regarding the display the MBA comes with 1440x900. My current laptop runs 1600x900. Would I notice significant difference? I currently live in Europe and have a travel to US later this month so I need to decide fairly quickly givent he MBP Retina's leadtime for delivery. Thanks for reading and any advice is welcome!